Vulnerability-Lookup

SUSE-SU-2026:1535-1

Vulnerability from csaf_suse - Published: 2026-04-21 14:34 - Updated: 2026-04-21 14:34

Summary

Security update for the Linux Kernel (Live Patch 68 for SUSE Linux Enterprise 12 SP5)

Severity

Important

Notes

Title of the patch: Security update for the Linux Kernel (Live Patch 68 for SUSE Linux Enterprise 12 SP5)

Description of the patch: This update for the SUSE Linux Enterprise Kernel 4.12.14-122.258 fixes various security issues The following security issues were fixed: - CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258396). - CVE-2026-23268: apparmor: fix unprivileged local user can do privileged policy management (bsc#1259859).

Patchnames: SUSE-2026-1535,SUSE-SLE-Live-Patching-12-SP5-2026-1535

CVE-2026-23191

7.1 (High)


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

Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

CVE-2026-23268

7 (High)


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

Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

References

URL

Category

	https://www.suse.com/support/security/rating/	external
	https://ftp.suse.com/pub/projects/security/csaf/s…	self
	https://www.suse.com/support/update/announcement/…	self
	https://lists.suse.com/pipermail/sle-updates/2026…	self
	https://bugzilla.suse.com/1258396	self
	https://bugzilla.suse.com/1259859	self
	https://www.suse.com/security/cve/CVE-2026-23191/	self
	https://www.suse.com/security/cve/CVE-2026-23268/	self
	https://www.suse.com/security/cve/CVE-2026-23191	external
	https://bugzilla.suse.com/1258395	external
	https://bugzilla.suse.com/1258396	external
	https://www.suse.com/security/cve/CVE-2026-23268	external
	https://bugzilla.suse.com/1258850	external
	https://bugzilla.suse.com/1259859	external

JSON

To clipboard

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      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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      },
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        "text": "\nThis update for the SUSE Linux Enterprise Kernel 4.12.14-122.258 fixes various security issues\n\nThe following security issues were fixed:\n\n- CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258396).\n- CVE-2026-23268: apparmor: fix unprivileged local user can do privileged policy management (bsc#1259859).\n",
        "title": "Description of the patch"
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        "title": "Patchnames"
      },
      {
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    "title": "Security update for the Linux Kernel (Live Patch 68 for SUSE Linux Enterprise 12 SP5)",
    "tracking": {
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      "id": "SUSE-SU-2026:1535-1",
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      "revision_history": [
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  "product_tree": {
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          "product_id": "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le"
        },
        "product_reference": "kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
        "relates_to_product_reference": "SUSE Linux Enterprise Live Patching 12 SP5"
      },
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      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-23191",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-23191"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: aloop: Fix racy access at PCM trigger\n\nThe PCM trigger callback of aloop driver tries to check the PCM state\nand stop the stream of the tied substream in the corresponding cable.\nSince both check and stop operations are performed outside the cable\nlock, this may result in UAF when a program attempts to trigger\nfrequently while opening/closing the tied stream, as spotted by\nfuzzers.\n\nFor addressing the UAF, this patch changes two things:\n- It covers the most of code in loopback_check_format() with\n  cable-\u003elock spinlock, and add the proper NULL checks.  This avoids\n  already some racy accesses.\n- In addition, now we try to check the state of the capture PCM stream\n  that may be stopped in this function, which was the major pain point\n  leading to UAF.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-23191",
          "url": "https://www.suse.com/security/cve/CVE-2026-23191"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258395 for CVE-2026-23191",
          "url": "https://bugzilla.suse.com/1258395"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258396 for CVE-2026-23191",
          "url": "https://bugzilla.suse.com/1258396"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
          ]
        }
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      "threats": [
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          "details": "important"
        }
      ],
      "title": "CVE-2026-23191"
    },
    {
      "cve": "CVE-2026-23268",
      "ids": [
        {
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          "text": "https://www.suse.com/security/cve/CVE-2026-23268"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix unprivileged local user can do privileged policy management\n\nAn unprivileged local user can load, replace, and remove profiles by\nopening the apparmorfs interfaces, via a confused deputy attack, by\npassing the opened fd to a privileged process, and getting the\nprivileged process to write to the interface.\n\nThis does require a privileged target that can be manipulated to do\nthe write for the unprivileged process, but once such access is\nachieved full policy management is possible and all the possible\nimplications that implies: removing confinement, DoS of system or\ntarget applications by denying all execution, by-passing the\nunprivileged user namespace restriction, to exploiting kernel bugs for\na local privilege escalation.\n\nThe policy management interface can not have its permissions simply\nchanged from 0666 to 0600 because non-root processes need to be able\nto load policy to different policy namespaces.\n\nInstead ensure the task writing the interface has privileges that\nare a subset of the task that opened the interface. This is already\ndone via policy for confined processes, but unconfined can delegate\naccess to the opened fd, by-passing the usual policy check.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
          "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
        ]
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-23268",
          "url": "https://www.suse.com/security/cve/CVE-2026-23268"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1258850 for CVE-2026-23268",
          "url": "https://bugzilla.suse.com/1258850"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1259859 for CVE-2026-23268",
          "url": "https://bugzilla.suse.com/1259859"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.s390x",
            "SUSE Linux Enterprise Live Patching 12 SP5:kgraft-patch-4_12_14-122_258-default-14-2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-21T14:34:30Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-23268"
    }
  ]
}

CVE-2026-23268 (GCVE-0-2026-23268)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:54 – Updated: 2026-04-18 08:57

Title

apparmor: fix unprivileged local user can do privileged policy management

Summary

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix unprivileged local user can do privileged policy management An unprivileged local user can load, replace, and remove profiles by opening the apparmorfs interfaces, via a confused deputy attack, by passing the opened fd to a privileged process, and getting the privileged process to write to the interface. This does require a privileged target that can be manipulated to do the write for the unprivileged process, but once such access is achieved full policy management is possible and all the possible implications that implies: removing confinement, DoS of system or target applications by denying all execution, by-passing the unprivileged user namespace restriction, to exploiting kernel bugs for a local privilege escalation. The policy management interface can not have its permissions simply changed from 0666 to 0600 because non-root processes need to be able to load policy to different policy namespaces. Instead ensure the task writing the interface has privileges that are a subset of the task that opened the interface. This is already done via policy for confined processes, but unconfined can delegate access to the opened fd, by-passing the usual policy check.

Severity ?

7.8 (High)


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

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a407a078cd41b5261…
	https://git.kernel.org/stable/c/4cafce4d6d0a66ec2…
	https://git.kernel.org/stable/c/33ee909702e047c94…
	https://git.kernel.org/stable/c/17debf5586020790b…
	https://git.kernel.org/stable/c/0fc63dd9170643d15…
	https://git.kernel.org/stable/c/b60b3f7a35c46b2e0…
	https://git.kernel.org/stable/c/b6a94eeca9c6c8f7c…
	https://git.kernel.org/stable/c/6601e13e828418794…
	https://www.qualys.com/2026/03/10/crack-armor.txt

Impacted products

Vendor

Product

Version

Linux

Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < a407a078cd41b5261b99d822af784bd9f136eb4d (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < 4cafce4d6d0a66ec27e3af5637c11901d60189fa (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < 33ee909702e047c94aaf41d4eea35626d509802c (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < 17debf5586020790b5717f96e5e6a3ca5bb961ab (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < 0fc63dd9170643d15c25681fca792539e23f4640 (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6 (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < b6a94eeca9c6c8f7c55ad44c62c98324f51ec596 (git)
Affected: b7fd2c0340eacbee892425e9007647568b7f2a3c , < 6601e13e82841879406bf9f369032656f441a425 (git)

Linux

Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.169 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.18 , ≤ 6.18.* (semver)
Unaffected: 6.19.8 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "security/apparmor/apparmorfs.c",
            "security/apparmor/include/policy.h",
            "security/apparmor/policy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a407a078cd41b5261b99d822af784bd9f136eb4d",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
            },
            {
              "lessThan": "4cafce4d6d0a66ec27e3af5637c11901d60189fa",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
            },
            {
              "lessThan": "33ee909702e047c94aaf41d4eea35626d509802c",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
            },
            {
              "lessThan": "17debf5586020790b5717f96e5e6a3ca5bb961ab",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
            },
            {
              "lessThan": "0fc63dd9170643d15c25681fca792539e23f4640",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
            },
            {
              "lessThan": "b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6",
              "status": "affected",
              "version": "b7fd2c0340eacbee892425e9007647568b7f2a3c",
              "versionType": "git"
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      "title": "apparmor: fix unprivileged local user can do privileged policy management",
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CVE-2026-23191 (GCVE-0-2026-23191)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-04-03 13:32

Title

ALSA: aloop: Fix racy access at PCM trigger

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix racy access at PCM trigger The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are performed outside the cable lock, this may result in UAF when a program attempts to trigger frequently while opening/closing the tied stream, as spotted by fuzzers. For addressing the UAF, this patch changes two things: - It covers the most of code in loopback_check_format() with cable->lock spinlock, and add the proper NULL checks. This avoids already some racy accesses. - In addition, now we try to check the state of the capture PCM stream that may be stopped in this function, which was the major pain point leading to UAF.

Severity ?

7.8 (High)


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

Assigner

Linux

References

URL

Sightings

Author	Source	Type	Date

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.

Action not permitted

SUSE-SU-2026:1535-1

CVE-2026-23268 (GCVE-0-2026-23268)

CVE-2026-23191 (GCVE-0-2026-23191)

Tags

Sightings

Nomenclature