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SUSE-SU-2025:0268-1

Vulnerability from csaf_suse - Published: 2025-01-28 13:03 - Updated: 2025-01-28 13:03
Summary
Security update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP6)
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP6)
Description of the patch: This update for the Linux Kernel 6.4.0-150600_8 fixes several issues. The following security issues were fixed: - CVE-2024-40921: net: bridge: mst: pass vlan group directly to br_mst_vlan_set_state (bsc#1227784). - CVE-2024-40920: net: bridge: mst: fix suspicious rcu usage in br_mst_set_state (bsc#1227781). - CVE-2024-36979: net: bridge: mst: fix vlan use-after-free (bsc#1227369). - CVE-2024-41057: cachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie() (bsc#1229275). - CVE-2024-36971: Fixed __dst_negative_advice() race (bsc#1226324).
Patchnames: SUSE-2025-268,SUSE-SLE-Module-Live-Patching-15-SP6-2025-268
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2024-36971
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2024-36979
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Recommended 1 product, the same list as for CVE-2024-36971
Threats
Impact important
CVE-2024-40920
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 1 product, the same list as for CVE-2024-36971
Threats
Impact moderate
CVE-2024-40921
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 1 product, the same list as for CVE-2024-36971
Threats
Impact moderate
CVE-2024-41057
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Recommended 1 product, the same list as for CVE-2024-36971
Threats
Impact important
References
To clipboard 

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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix __dst_negative_advice() race\n\n__dst_negative_advice() does not enforce proper RCU rules when\nsk-\u003edst_cache must be cleared, leading to possible UAF.\n\nRCU rules are that we must first clear sk-\u003esk_dst_cache,\nthen call dst_release(old_dst).\n\nNote that sk_dst_reset(sk) is implementing this protocol correctly,\nwhile __dst_negative_advice() uses the wrong order.\n\nGiven that ip6_negative_advice() has special logic\nagainst RTF_CACHE, this means each of the three -\u003enegative_advice()\nexisting methods must perform the sk_dst_reset() themselves.\n\nNote the check against NULL dst is centralized in\n__dst_negative_advice(), there is no need to duplicate\nit in various callbacks.\n\nMany thanks to Clement Lecigne for tracking this issue.\n\nThis old bug became visible after the blamed commit, using UDP sockets.",
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        }
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            "version": "3.1"
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          "text": "https://www.suse.com/security/cve/CVE-2024-36979"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: fix vlan use-after-free\n\nsyzbot reported a suspicious rcu usage[1] in bridge\u0027s mst code. While\nfixing it I noticed that nothing prevents a vlan to be freed while\nwalking the list from the same path (br forward delay timer). Fix the rcu\nusage and also make sure we are not accessing freed memory by making\nbr_mst_vlan_set_state use rcu read lock.\n\n[1]\n WARNING: suspicious RCU usage\n 6.9.0-rc6-syzkaller #0 Not tainted\n -----------------------------\n net/bridge/br_private.h:1599 suspicious rcu_dereference_protected() usage!\n ...\n stack backtrace:\n CPU: 1 PID: 8017 Comm: syz-executor.1 Not tainted 6.9.0-rc6-syzkaller #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\n Call Trace:\n  \u003cIRQ\u003e\n  __dump_stack lib/dump_stack.c:88 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n  lockdep_rcu_suspicious+0x221/0x340 kernel/locking/lockdep.c:6712\n  nbp_vlan_group net/bridge/br_private.h:1599 [inline]\n  br_mst_set_state+0x1ea/0x650 net/bridge/br_mst.c:105\n  br_set_state+0x28a/0x7b0 net/bridge/br_stp.c:47\n  br_forward_delay_timer_expired+0x176/0x440 net/bridge/br_stp_timer.c:88\n  call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793\n  expire_timers kernel/time/timer.c:1844 [inline]\n  __run_timers kernel/time/timer.c:2418 [inline]\n  __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2429\n  run_timer_base kernel/time/timer.c:2438 [inline]\n  run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448\n  __do_softirq+0x2c6/0x980 kernel/softirq.c:554\n  invoke_softirq kernel/softirq.c:428 [inline]\n  __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633\n  irq_exit_rcu+0x9/0x30 kernel/softirq.c:645\n  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]\n  sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043\n  \u003c/IRQ\u003e\n  \u003cTASK\u003e\n asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702\n RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758\n Code: 2b 00 74 08 4c 89 f7 e8 ba d1 84 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 \u003c4b\u003e c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25\n RSP: 0018:ffffc90013657100 EFLAGS: 00000206\n RAX: 0000000000000001 RBX: 1ffff920026cae2c RCX: 0000000000000001\n RDX: dffffc0000000000 RSI: ffffffff8bcaca00 RDI: ffffffff8c1eaa60\n RBP: ffffc90013657260 R08: ffffffff92efe507 R09: 1ffffffff25dfca0\n R10: dffffc0000000000 R11: fffffbfff25dfca1 R12: 1ffff920026cae28\n R13: dffffc0000000000 R14: ffffc90013657160 R15: 0000000000000246",
          "title": "CVE description"
        }
      ],
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        ]
      },
      "references": [
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          "summary": "CVE-2024-36979",
          "url": "https://www.suse.com/security/cve/CVE-2024-36979"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1226604 for CVE-2024-36979",
          "url": "https://bugzilla.suse.com/1226604"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1227369 for CVE-2024-36979",
          "url": "https://bugzilla.suse.com/1227369"
        }
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            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
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          "date": "2025-01-28T13:03:45Z",
          "details": "important"
        }
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    },
    {
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      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2024-40920"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: fix suspicious rcu usage in br_mst_set_state\n\nI converted br_mst_set_state to RCU to avoid a vlan use-after-free\nbut forgot to change the vlan group dereference helper. Switch to vlan\ngroup RCU deref helper to fix the suspicious rcu usage warning.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
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      "references": [
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          "category": "external",
          "summary": "CVE-2024-40920",
          "url": "https://www.suse.com/security/cve/CVE-2024-40920"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1227781 for CVE-2024-40920",
          "url": "https://bugzilla.suse.com/1227781"
        }
      ],
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          "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 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
          ]
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      ],
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
          ]
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          "date": "2025-01-28T13:03:45Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2024-40920"
    },
    {
      "cve": "CVE-2024-40921",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2024-40921"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: pass vlan group directly to br_mst_vlan_set_state\n\nPass the already obtained vlan group pointer to br_mst_vlan_set_state()\ninstead of dereferencing it again. Each caller has already correctly\ndereferenced it for their context. This change is required for the\nfollowing suspicious RCU dereference fix. No functional changes\nintended.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2024-40921",
          "url": "https://www.suse.com/security/cve/CVE-2024-40921"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1227784 for CVE-2024-40921",
          "url": "https://bugzilla.suse.com/1227784"
        }
      ],
      "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 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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          ]
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      ],
      "threats": [
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          "category": "impact",
          "date": "2025-01-28T13:03:45Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2024-40921"
    },
    {
      "cve": "CVE-2024-41057",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2024-41057"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie()\n\nWe got the following issue in our fault injection stress test:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in cachefiles_withdraw_cookie+0x4d9/0x600\nRead of size 8 at addr ffff888118efc000 by task kworker/u78:0/109\n\nCPU: 13 PID: 109 Comm: kworker/u78:0 Not tainted 6.8.0-dirty #566\nCall Trace:\n \u003cTASK\u003e\n kasan_report+0x93/0xc0\n cachefiles_withdraw_cookie+0x4d9/0x600\n fscache_cookie_state_machine+0x5c8/0x1230\n fscache_cookie_worker+0x91/0x1c0\n process_one_work+0x7fa/0x1800\n [...]\n\nAllocated by task 117:\n kmalloc_trace+0x1b3/0x3c0\n cachefiles_acquire_volume+0xf3/0x9c0\n fscache_create_volume_work+0x97/0x150\n process_one_work+0x7fa/0x1800\n [...]\n\nFreed by task 120301:\n kfree+0xf1/0x2c0\n cachefiles_withdraw_cache+0x3fa/0x920\n cachefiles_put_unbind_pincount+0x1f6/0x250\n cachefiles_daemon_release+0x13b/0x290\n __fput+0x204/0xa00\n task_work_run+0x139/0x230\n do_exit+0x87a/0x29b0\n [...]\n==================================================================\n\nFollowing is the process that triggers the issue:\n\n           p1                |             p2\n------------------------------------------------------------\n                              fscache_begin_lookup\n                               fscache_begin_volume_access\n                                fscache_cache_is_live(fscache_cache)\ncachefiles_daemon_release\n cachefiles_put_unbind_pincount\n  cachefiles_daemon_unbind\n   cachefiles_withdraw_cache\n    fscache_withdraw_cache\n     fscache_set_cache_state(cache, FSCACHE_CACHE_IS_WITHDRAWN);\n    cachefiles_withdraw_objects(cache)\n    fscache_wait_for_objects(fscache)\n      atomic_read(\u0026fscache_cache-\u003eobject_count) == 0\n                              fscache_perform_lookup\n                               cachefiles_lookup_cookie\n                                cachefiles_alloc_object\n                                 refcount_set(\u0026object-\u003eref, 1);\n                                 object-\u003evolume = volume\n                                 fscache_count_object(vcookie-\u003ecache);\n                                  atomic_inc(\u0026fscache_cache-\u003eobject_count)\n    cachefiles_withdraw_volumes\n     cachefiles_withdraw_volume\n      fscache_withdraw_volume\n      __cachefiles_free_volume\n       kfree(cachefiles_volume)\n                              fscache_cookie_state_machine\n                               cachefiles_withdraw_cookie\n                                cache = object-\u003evolume-\u003ecache;\n                                // cachefiles_volume UAF !!!\n\nAfter setting FSCACHE_CACHE_IS_WITHDRAWN, wait for all the cookie lookups\nto complete first, and then wait for fscache_cache-\u003eobject_count == 0 to\navoid the cookie exiting after the volume has been freed and triggering\nthe above issue. Therefore call fscache_withdraw_volume() before calling\ncachefiles_withdraw_objects().\n\nThis way, after setting FSCACHE_CACHE_IS_WITHDRAWN, only the following two\ncases will occur:\n1) fscache_begin_lookup fails in fscache_begin_volume_access().\n2) fscache_withdraw_volume() will ensure that fscache_count_object() has\n   been executed before calling fscache_wait_for_objects().",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Live Patching 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2024-41057",
          "url": "https://www.suse.com/security/cve/CVE-2024-41057"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1228462 for CVE-2024-41057",
          "url": "https://bugzilla.suse.com/1228462"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1229275 for CVE-2024-41057",
          "url": "https://bugzilla.suse.com/1229275"
        }
      ],
      "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 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.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 15 SP6:kernel-livepatch-6_4_0-150600_8-rt-8-150600.3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-01-28T13:03:45Z",
          "details": "important"
        }
      ],
      "title": "CVE-2024-41057"
    }
  ]
}



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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

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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.


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.