Vulnerability-Lookup

CVE-2026-53357 (GCVE-0-2026-53357)

Vulnerability from cvelistv5 – Published: 2026-07-02 13:43 – Updated: 2026-07-18 07:33

Title

Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del() bt_accept_dequeue() unlinks a not-yet-accepted child from the parent accept queue and release_sock()s it before returning, so the returned sk has no caller reference and is unlocked. l2cap_sock_cleanup_listen() walks these children on listening-socket close. A concurrent HCI disconnect drives hci_rx_work -> l2cap_conn_del() which runs l2cap_chan_del() + l2cap_sock_kill() and frees the child sk and its l2cap_chan; cleanup_listen() then uses both: BUG: KASAN: slab-use-after-free in l2cap_sock_kill l2cap_sock_kill / l2cap_sock_cleanup_listen / __x64_sys_close Freed by: l2cap_conn_del -> l2cap_sock_close_cb -> l2cap_sock_kill This is distinct from the two fixes already in this area: commit e83f5e24da741 ("Bluetooth: serialize accept_q access") serialises the accept_q list/poll and takes temporary refs inside bt_accept_dequeue(), and CVE-2025-39860 serialises the userspace close()/accept() race by calling cleanup_listen() under lock_sock() in l2cap_sock_release(). Neither covers l2cap_conn_del() running from hci_rx_work, so this UAF still reproduces on current bluetooth/master. Take the reference at the source: bt_accept_dequeue() does sock_hold() while sk is still locked, before release_sock(); callers sock_put(). cleanup_listen() pins the chan with l2cap_chan_hold_unless_zero() under a brief child sk lock (serialising vs l2cap_sock_teardown_cb()), drops it before l2cap_chan_lock(), and skips a duplicate l2cap_sock_kill() on SOCK_DEAD. conn->lock is not taken here: cleanup_listen() runs under the parent sk lock and that would invert conn->lock -> chan->lock -> sk_lock (lockdep). KASAN/SMP: an unprivileged listen/close vs HCI-disconnect race produced 12 use-after-free reports per run before this change; 0, and no lockdep report, over 1600+ raced iterations after it on bluetooth/master.

Severity

8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/751de6ec671fe75ad…
https://git.kernel.org/stable/c/407217734835d21d4…
https://git.kernel.org/stable/c/7eebd4c2c86f573af…
https://git.kernel.org/stable/c/5d86d2f1b4d9a508c…
https://git.kernel.org/stable/c/87c543e2f78d0871f…
https://git.kernel.org/stable/c/added121339507147…
https://git.kernel.org/stable/c/a5ca86a6097a8b030…
https://git.kernel.org/stable/c/ab1513597c6cf17cd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 751de6ec671fe75ad9cf65a0638d2a06b6a5984d (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 407217734835d21d4e0105ebf347860dc1806f88 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 7eebd4c2c86f573af87ff165d08a83432eb0b919 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 5d86d2f1b4d9a508c441d3e45277ae1a73cfed57 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 87c543e2f78d0871f271df92dab98901bbd5b6f5 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < added1213395071470a900cc845a042fb51882a6 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < a5ca86a6097a8b030ca3226cd300b17ed330f966 (git) Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < ab1513597c6cf17cd1ad2a21e3b045421b48e022 (git)
Linux	Linux	Affected: 5.7 Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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            "net/bluetooth/af_bluetooth.c",
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              "status": "unaffected",
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()\n\nbt_accept_dequeue() unlinks a not-yet-accepted child from the parent\naccept queue and release_sock()s it before returning, so the returned\nsk has no caller reference and is unlocked.\n\nl2cap_sock_cleanup_listen() walks these children on listening-socket\nclose.  A concurrent HCI disconnect drives hci_rx_work -\u003e\nl2cap_conn_del() which runs l2cap_chan_del() + l2cap_sock_kill() and\nfrees the child sk and its l2cap_chan; cleanup_listen() then uses both:\n\n  BUG: KASAN: slab-use-after-free in l2cap_sock_kill\n    l2cap_sock_kill / l2cap_sock_cleanup_listen / __x64_sys_close\n  Freed by: l2cap_conn_del -\u003e l2cap_sock_close_cb -\u003e l2cap_sock_kill\n\nThis is distinct from the two fixes already in this area: commit\ne83f5e24da741 (\"Bluetooth: serialize accept_q access\") serialises the\naccept_q list/poll and takes temporary refs inside bt_accept_dequeue(),\nand CVE-2025-39860 serialises the userspace close()/accept() race by\ncalling cleanup_listen() under lock_sock() in l2cap_sock_release().\nNeither covers l2cap_conn_del() running from hci_rx_work, so this UAF\nstill reproduces on current bluetooth/master.\n\nTake the reference at the source: bt_accept_dequeue() does sock_hold()\nwhile sk is still locked, before release_sock(); callers sock_put().\ncleanup_listen() pins the chan with l2cap_chan_hold_unless_zero() under\na brief child sk lock (serialising vs l2cap_sock_teardown_cb()), drops\nit before l2cap_chan_lock(), and skips a duplicate l2cap_sock_kill() on\nSOCK_DEAD.  conn-\u003elock is not taken here: cleanup_listen() runs under\nthe parent sk lock and that would invert\nconn-\u003elock -\u003e chan-\u003elock -\u003e sk_lock (lockdep).\n\nKASAN/SMP: an unprivileged listen/close vs HCI-disconnect race produced\n12 use-after-free reports per run before this change; 0, and no lockdep\nreport, over 1600+ raced iterations after it on bluetooth/master."
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      "title": "Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53357",
    "datePublished": "2026-07-02T13:43:17.077Z",
    "dateReserved": "2026-06-09T07:44:35.400Z",
    "dateUpdated": "2026-07-18T07:33:25.711Z",
    "state": "PUBLISHED"
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    "epss": {
      "cve": "CVE-2026-53357",
      "date": "2026-07-26",
      "epss": "0.00258",
      "percentile": "0.17391"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-09T14:38:55.000Z",
      "cve": "CVE-2026-53357",
      "id": "msrc_CVE-2026-53357",
      "initial_release_date": "2026-07-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53357.json",
      "version": "2"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53357\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-02T15:17:03.103\",\"lastModified\":\"2026-07-22T19:06:30.080\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()\\n\\nbt_accept_dequeue() unlinks a not-yet-accepted child from the parent\\naccept queue and release_sock()s it before returning, so the returned\\nsk has no caller reference and is unlocked.\\n\\nl2cap_sock_cleanup_listen() walks these children on listening-socket\\nclose.  A concurrent HCI disconnect drives hci_rx_work -\u003e\\nl2cap_conn_del() which runs l2cap_chan_del() + l2cap_sock_kill() and\\nfrees the child sk and its l2cap_chan; cleanup_listen() then uses both:\\n\\n  BUG: KASAN: slab-use-after-free in l2cap_sock_kill\\n    l2cap_sock_kill / l2cap_sock_cleanup_listen / __x64_sys_close\\n  Freed by: l2cap_conn_del -\u003e l2cap_sock_close_cb -\u003e l2cap_sock_kill\\n\\nThis is distinct from the two fixes already in this area: commit\\ne83f5e24da741 (\\\"Bluetooth: serialize accept_q access\\\") serialises the\\naccept_q list/poll and takes temporary refs inside bt_accept_dequeue(),\\nand CVE-2025-39860 serialises the userspace close()/accept() race by\\ncalling cleanup_listen() under lock_sock() in l2cap_sock_release().\\nNeither covers l2cap_conn_del() running from hci_rx_work, so this UAF\\nstill reproduces on current bluetooth/master.\\n\\nTake the reference at the source: bt_accept_dequeue() does sock_hold()\\nwhile sk is still locked, before release_sock(); callers sock_put().\\ncleanup_listen() pins the chan with l2cap_chan_hold_unless_zero() under\\na brief child sk lock (serialising vs l2cap_sock_teardown_cb()), drops\\nit before l2cap_chan_lock(), and skips a duplicate l2cap_sock_kill() on\\nSOCK_DEAD.  conn-\u003elock is not taken here: cleanup_listen() runs under\\nthe parent sk lock and that would invert\\nconn-\u003elock -\u003e chan-\u003elock -\u003e sk_lock (lockdep).\\n\\nKASAN/SMP: an unprivileged listen/close vs HCI-disconnect race produced\\n12 use-after-free reports per run before this change; 0, and no lockdep\\nreport, over 1600+ raced iterations after it on bluetooth/master.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/af_bluetooth.c\",\"net/bluetooth/iso.c\",\"net/bluetooth/l2cap_sock.c\",\"net/bluetooth/rfcomm/sock.c\",\"net/bluetooth/sco.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"751de6ec671fe75ad9cf65a0638d2a06b6a5984d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"407217734835d21d4e0105ebf347860dc1806f88\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"7eebd4c2c86f573af87ff165d08a83432eb0b919\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"5d86d2f1b4d9a508c441d3e45277ae1a73cfed57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"87c543e2f78d0871f271df92dab98901bbd5b6f5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"added1213395071470a900cc845a042fb51882a6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"a5ca86a6097a8b030ca3226cd300b17ed330f966\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15f02b91056253e8cdc592888f431da0731337b8\",\"lessThan\":\"ab1513597c6cf17cd1ad2a21e3b045421b48e022\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/af_bluetooth.c\",\"net/bluetooth/iso.c\",\"net/bluetooth/l2cap_sock.c\",\"net/bluetooth/rfcomm/sock.c\",\"net/bluetooth/sco.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.259\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.142\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.1,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7\",\"versionEndExcluding\":\"5.10.259\",\"matchCriteriaId\":\"8CC4A95D-0251-4FDF-8AFB-BBE0FAD54A79\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.210\",\"matchCriteriaId\":\"5E938CDF-D1C4-43D0-98DC-9E11B6B55801\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.175\",\"matchCriteriaId\":\"92385813-D91D-480D-83A1-F423D2CBB2BA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.142\",\"matchCriteriaId\":\"FBFF77B0-526A-4AF1-84D0-ED7187624A67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.92\",\"matchCriteriaId\":\"9CB90BD9-95B7-4D7F-9F17-4ECE6CFB66C9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.34\",\"matchCriteriaId\":\"A4B1EF6D-18D7-4838-BC37-7499D5DCC3C0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.11\",\"matchCriteriaId\":\"0520D091-FC52-4A50-AF07-70AE7D08B750\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC732D08-5F7B-46D9-B154-E60C7F4F0A97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"E5910A9D-F60A-409A-B486-FE66BFEBA9B9\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/407217734835d21d4e0105ebf347860dc1806f88\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5d86d2f1b4d9a508c441d3e45277ae1a73cfed57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/751de6ec671fe75ad9cf65a0638d2a06b6a5984d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7eebd4c2c86f573af87ff165d08a83432eb0b919\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/87c543e2f78d0871f271df92dab98901bbd5b6f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a5ca86a6097a8b030ca3226cd300b17ed330f966\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ab1513597c6cf17cd1ad2a21e3b045421b48e022\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/added1213395071470a900cc845a042fb51882a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-18T08:05:29+00:00",
      "cve": "CVE-2026-53357",
      "id": "CVE-2026-53357",
      "initial_release_date": "2026-07-02T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53357.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-21T23:49:04Z",
      "cve": "CVE-2026-53357",
      "id": "CVE-2026-53357",
      "initial_release_date": "2026-07-03T03:03:36Z",
      "product_status:known_affected": "161",
      "product_status:known_not_affected": "33",
      "product_status:recommended": "129",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53357",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53357.json",
      "version": "7"
    }
  }
}

WID-SEC-W-2026-2190

Vulnerability from csaf_certbund - Published: 2026-07-02 22:00 - Updated: 2026-07-21 22:00

Summary

Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Der Kernel stellt den Kern des Linux Betriebssystems dar.

Angriff: Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux

CVE-2026-53357

Affected products

Known affected 12 products

Product	Identifier	Version
Open Source Linux Kernel <6.1.176 Open Source / Linux Kernel		<6.1.176
Open Source Linux Kernel <6.6.143 Open Source / Linux Kernel		<6.6.143
Open Source Linux Kernel <6.12.93 Open Source / Linux Kernel		<6.12.93
Debian Linux Debian	`cpe:/o:debian:debian_linux:-`	—
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—
Open Source Linux Kernel <6.18.35 Open Source / Linux Kernel		<6.18.35
Microsoft Azure Linux azl3 Microsoft / Azure Linux	`cpe:/o:microsoft:azure_linux:azl3`	azl3
Open Source Linux Kernel <7.0.12 Open Source / Linux Kernel		<7.0.12
Open Source Linux Kernel <7.1 Open Source / Linux Kernel		<7.1
Open Source Linux Kernel <5.10.259 Open Source / Linux Kernel		<5.10.259
Open Source Linux Kernel <5.15.210 Open Source / Linux Kernel		<5.15.210

CVE-2026-53358

Affected products

Known affected 12 products

Product	Identifier	Version
Open Source Linux Kernel <6.1.176 Open Source / Linux Kernel		<6.1.176
Open Source Linux Kernel <6.6.143 Open Source / Linux Kernel		<6.6.143
Open Source Linux Kernel <6.12.93 Open Source / Linux Kernel		<6.12.93
Debian Linux Debian	`cpe:/o:debian:debian_linux:-`	—
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
SUSE Linux SUSE	`cpe:/o:suse:suse_linux:-`	—
Open Source Linux Kernel <6.18.35 Open Source / Linux Kernel		<6.18.35
Microsoft Azure Linux azl3 Microsoft / Azure Linux	`cpe:/o:microsoft:azure_linux:azl3`	azl3
Open Source Linux Kernel <7.0.12 Open Source / Linux Kernel		<7.0.12
Open Source Linux Kernel <7.1 Open Source / Linux Kernel		<7.1
Open Source Linux Kernel <5.10.259 Open Source / Linux Kernel		<5.10.259
Open Source Linux Kernel <5.15.210 Open Source / Linux Kernel		<5.15.210

References

14 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://lore.kernel.org/linux-cve-announce/	external
https://lore.kernel.org/linux-cve-announce/202607…	external
https://lore.kernel.org/linux-cve-announce/202607…	external
https://lists.debian.org/debian-lts-announce/2026…	external
https://lists.debian.org/debian-lts-announce/2026…	external
https://lists.debian.org/debian-lts-announce/2026…	external
https://msrc.microsoft.com/update-guide/	external
https://lists.suse.com/pipermail/sle-security-upd…	external
https://ubuntu.com/security/notices/USN-8569-1	external
https://ubuntu.com/security/notices/USN-8568-1	external
https://ubuntu.com/security/notices/USN-8566-1	external
https://lists.suse.com/pipermail/sle-security-upd…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Der Kernel stellt den Kern des Linux Betriebssystems dar.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-2190 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2190.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-2190 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2190"
      },
      {
        "category": "external",
        "summary": "Kernel CVE Announce Mailingliste",
        "url": "https://lore.kernel.org/linux-cve-announce/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2026-53357",
        "url": "https://lore.kernel.org/linux-cve-announce/2026070234-CVE-2026-53357-18f1@gregkh/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2026-53358",
        "url": "https://lore.kernel.org/linux-cve-announce/2026070236-CVE-2026-53358-6f81@gregkh/"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-4671 vom 2026-07-05",
        "url": "https://lists.debian.org/debian-lts-announce/2026/07/msg00012.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-4665 vom 2026-07-03",
        "url": "https://lists.debian.org/debian-lts-announce/2026/07/msg00006.html"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-4664 vom 2026-07-03",
        "url": "https://lists.debian.org/debian-lts-announce/2026/07/msg00005.html"
      },
      {
        "category": "external",
        "summary": "Microsoft Leitfaden f\u00fcr Sicherheitsupdates vom 2026-07-14",
        "url": "https://msrc.microsoft.com/update-guide/"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:3130-1 vom 2026-07-20",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027664.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8569-1 vom 2026-07-20",
        "url": "https://ubuntu.com/security/notices/USN-8569-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8568-1 vom 2026-07-20",
        "url": "https://ubuntu.com/security/notices/USN-8568-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8566-1 vom 2026-07-20",
        "url": "https://ubuntu.com/security/notices/USN-8566-1"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:3156-1 vom 2026-07-21",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027682.html"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel: Mehrere Schwachstellen erm\u00f6glichen Denial of Service",
    "tracking": {
      "current_release_date": "2026-07-21T22:00:00.000+00:00",
      "generator": {
        "date": "2026-07-22T09:19:47.802+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-2190",
      "initial_release_date": "2026-07-02T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-07-02T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-07-05T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2026-07-14T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates aufgenommen"
        },
        {
          "date": "2026-07-20T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE und Ubuntu aufgenommen"
        },
        {
          "date": "2026-07-21T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "azl3",
                "product": {
                  "name": "Microsoft Azure Linux azl3",
                  "product_id": "T049210",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:microsoft:azure_linux:azl3"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c5.10.259",
                "product": {
                  "name": "Open Source Linux Kernel \u003c5.10.259",
                  "product_id": "T056014"
                }
              },
              {
                "category": "product_version",
                "name": "5.10.259",
                "product": {
                  "name": "Open Source Linux Kernel 5.10.259",
                  "product_id": "T056014-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:5.10.259"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c5.15.210",
                "product": {
                  "name": "Open Source Linux Kernel \u003c5.15.210",
                  "product_id": "T056015"
                }
              },
              {
                "category": "product_version",
                "name": "5.15.210",
                "product": {
                  "name": "Open Source Linux Kernel 5.15.210",
                  "product_id": "T056015-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:5.15.210"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.1.176",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.1.176",
                  "product_id": "T056016"
                }
              },
              {
                "category": "product_version",
                "name": "6.1.176",
                "product": {
                  "name": "Open Source Linux Kernel 6.1.176",
                  "product_id": "T056016-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.1.176"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.6.143",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.6.143",
                  "product_id": "T056018"
                }
              },
              {
                "category": "product_version",
                "name": "6.6.143",
                "product": {
                  "name": "Open Source Linux Kernel 6.6.143",
                  "product_id": "T056018-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.6.143"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.12.93",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.12.93",
                  "product_id": "T056019"
                }
              },
              {
                "category": "product_version",
                "name": "6.12.93",
                "product": {
                  "name": "Open Source Linux Kernel 6.12.93",
                  "product_id": "T056019-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.12.93"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.18.35",
                "product": {
                  "name": "Open Source Linux Kernel \u003c6.18.35",
                  "product_id": "T056021"
                }
              },
              {
                "category": "product_version",
                "name": "6.18.35",
                "product": {
                  "name": "Open Source Linux Kernel 6.18.35",
                  "product_id": "T056021-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.18.35"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.0.12",
                "product": {
                  "name": "Open Source Linux Kernel \u003c7.0.12",
                  "product_id": "T056022"
                }
              },
              {
                "category": "product_version",
                "name": "7.0.12",
                "product": {
                  "name": "Open Source Linux Kernel 7.0.12",
                  "product_id": "T056022-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:7.0.12"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c7.1",
                "product": {
                  "name": "Open Source Linux Kernel \u003c7.1",
                  "product_id": "T056024"
                }
              },
              {
                "category": "product_version",
                "name": "7.1",
                "product": {
                  "name": "Open Source Linux Kernel 7.1",
                  "product_id": "T056024-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:7.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Linux Kernel"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T054646",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T055947",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-53357",
      "product_status": {
        "known_affected": [
          "T056016",
          "T056018",
          "T056019",
          "2951",
          "T055947",
          "T054646",
          "T056021",
          "T049210",
          "T056022",
          "T056024",
          "T056014",
          "T056015"
        ]
      },
      "release_date": "2026-07-02T22:00:00.000+00:00",
      "title": "CVE-2026-53357"
    },
    {
      "cve": "CVE-2026-53358",
      "product_status": {
        "known_affected": [
          "T056016",
          "T056018",
          "T056019",
          "2951",
          "T055947",
          "T054646",
          "T056021",
          "T049210",
          "T056022",
          "T056024",
          "T056014",
          "T056015"
        ]
      },
      "release_date": "2026-07-02T22:00:00.000+00:00",
      "title": "CVE-2026-53358"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-53357 (GCVE-0-2026-53357)

WID-SEC-W-2026-2190

Tags

Sightings

Nomenclature