SUSE-SU-2026:3009-1

Vulnerability from csaf_suse - Published: 2026-07-15 07:33 - Updated: 2026-09-17 16:31
Summary
Security update for the Linux Kernel (Live Patch 42 for SUSE Linux Enterprise 15 SP5)
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel (Live Patch 42 for SUSE Linux Enterprise 15 SP5)
Description of the patch: This update for the SUSE Linux Enterprise Kernel 5.14.21-150500.55.172 fixes various security issues The following security issues were fixed: - CVE-2026-46173: exit: prevent preemption of oopsing TASK_DEAD task (bsc#1267723). - CVE-2026-52909: ip6_vti: set netns_immutable on the fallback device (bsc#1268662). - CVE-2026-52943: net: skbuff: fix missing zerocopy reference in pskb_carve helpers (bsc#1269023).
Patchnames: SUSE-2026-3007,SUSE-2026-3009,SUSE-SLE-Module-Live-Patching-15-SP4-2026-3009,SUSE-SLE-Module-Live-Patching-15-SP5-2026-3007
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64 —
Vendor Fix
Threats
Impact important
Affected products
Recommended 6 products, the same list as for CVE-2026-46173
Threats
Impact important
Affected products
Recommended 6 products, the same list as for CVE-2026-46173
Threats
Impact important

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          "text": "https://www.suse.com/security/cve/CVE-2026-46173"
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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nexit: prevent preemption of oopsing TASK_DEAD task\n\nWhen an already-exiting task oopses, make_task_dead() currently calls\ndo_task_dead() with preemption enabled.  That is forbidden:\ndo_task_dead() calls __schedule(), which has a comment saying \"WARNING:\nmust be called with preemption disabled!\".\n\nIf an oopsing task is preempted in do_task_dead(), between becoming\nTASK_DEAD and entering the scheduler explicitly, bad things happen:\nfinish_task_switch() assumes that once the scheduler has switched away\nfrom a TASK_DEAD task, the task can never run again and its stack is no\nlonger needed; but that assumption apparently doesn\u0027t hold if the dead\ntask was preempted (the SM_PREEMPT case).\n\nThis means that the scheduler ends up repeatedly dropping references on\nthe dead task\u0027s stack, which can lead to use-after-free or double-free\nof the entire task stack; in other words, two tasks can end up running\non the same stack, resulting in various kinds of memory corruption.\n\n(This does not just affect \"recursively oopsing\" tasks; it is enough to\noops once during task exit, for example in a file_operations::release\nhandler)",
          "title": "CVE description"
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      ],
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          "summary": "SUSE Bug 1267722 for CVE-2026-46173",
          "url": "https://bugzilla.suse.com/1267722"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1267723 for CVE-2026-46173",
          "url": "https://bugzilla.suse.com/1267723"
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      ],
      "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",
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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          "date": "2026-07-15T07:33:47Z",
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        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_vti: set netns_immutable on the fallback device.\n\njohn1988 and Noam Rathaus reported that vti6_init_net() does not set the\nnetns_immutable flag on the per-netns fallback tunnel device (ip6_vti0).\n\nOther similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel)\ncorrectly set this flag during their fallback device initialization to\nprevent them from being moved to another network namespace.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-52909",
          "url": "https://www.suse.com/security/cve/CVE-2026-52909"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268660 for CVE-2026-52909",
          "url": "https://bugzilla.suse.com/1268660"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268662 for CVE-2026-52909",
          "url": "https://bugzilla.suse.com/1268662"
        }
      ],
      "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 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-15T07:33:47Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-52909"
    },
    {
      "cve": "CVE-2026-52943",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-52943"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix missing zerocopy reference in pskb_carve helpers\n\npskb_carve_inside_header() and pskb_carve_inside_nonlinear() both copy\nthe old skb_shared_info header into a new buffer via memcpy(), which\nincludes the destructor_arg pointer (uarg) for MSG_ZEROCOPY skbs.\nNeither function calls net_zcopy_get() for the new shinfo, creating an\nunaccounted holder: every skb_shared_info with destructor_arg set will\ncall skb_zcopy_clear() once when freed, but the corresponding\nnet_zcopy_get() was never called for the new copy. Repeated calls\ndrive uarg-\u003erefcnt to zero prematurely, freeing ubuf_info_msgzc while\nTX skbs still hold live destructor_arg pointers.\n\nKASAN reports use-after-free on a freed ubuf_info_msgzc:\n\n  BUG: KASAN: slab-use-after-free in skb_release_data+0x77b/0x810\n  Read of size 8 at addr ffff88801574d3e8 by task poc/220\n\n  Call Trace:\n   skb_release_data+0x77b/0x810\n   kfree_skb_list_reason+0x13e/0x610\n   skb_release_data+0x4cd/0x810\n   sk_skb_reason_drop+0xf3/0x340\n   skb_queue_purge_reason+0x282/0x440\n   rds_tcp_inc_free+0x1e/0x30\n   rds_recvmsg+0x354/0x1780\n   __sys_recvmsg+0xdf/0x180\n\n  Allocated by task 219:\n   msg_zerocopy_realloc+0x157/0x7b0\n   tcp_sendmsg_locked+0x2892/0x3ba0\n\n  Freed by task 219:\n   ip_recv_error+0x74a/0xb10\n   tcp_recvmsg+0x475/0x530\n\nThe skb consuming the late access still referenced the same uarg via\nshinfo-\u003edestructor_arg copied by pskb_carve_inside_nonlinear() without\na refcount bump. This has been verified to be reliably exploitable: a\nworking proof-of-concept achieves full root privilege escalation from\nan unprivileged local user on a default kernel configuration.\n\nThe fix follows the pattern of pskb_expand_head() which has the same\nmemcpy/cloned structure. For pskb_carve_inside_header(), net_zcopy_get()\nis placed after skb_orphan_frags() succeeds, so the orphan error path\nneeds no cleanup. For pskb_carve_inside_nonlinear(), net_zcopy_get() is\nplaced after all failure points and just before skb_release_data(), so\nno error path needs cleanup at all -- matching pskb_expand_head() more\nclosely and avoiding the need for a balancing net_zcopy_put().",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
          "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-52943",
          "url": "https://www.suse.com/security/cve/CVE-2026-52943"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1269022 for CVE-2026-52943",
          "url": "https://bugzilla.suse.com/1269022"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1269023 for CVE-2026-52943",
          "url": "https://bugzilla.suse.com/1269023"
        }
      ],
      "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 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.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 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_225-default-0:2-150400.2.1.x86_64",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.ppc64le",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.s390x",
            "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_172-default-0:2-150500.2.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-07-15T07:33:47Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-52943"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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