CVE-2024-40954 (GCVE-0-2024-40954)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2025-11-03 21:58
VLAI?
Title
net: do not leave a dangling sk pointer, when socket creation fails
Summary
In the Linux kernel, the following vulnerability has been resolved: net: do not leave a dangling sk pointer, when socket creation fails It is possible to trigger a use-after-free by: * attaching an fentry probe to __sock_release() and the probe calling the bpf_get_socket_cookie() helper * running traceroute -I 1.1.1.1 on a freshly booted VM A KASAN enabled kernel will log something like below (decoded and stripped): ================================================================== BUG: KASAN: slab-use-after-free in __sock_gen_cookie (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29) Read of size 8 at addr ffff888007110dd8 by task traceroute/299 CPU: 2 PID: 299 Comm: traceroute Tainted: G E 6.10.0-rc2+ #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:117 (discriminator 1)) print_report (mm/kasan/report.c:378 mm/kasan/report.c:488) ? __sock_gen_cookie (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29) kasan_report (mm/kasan/report.c:603) ? __sock_gen_cookie (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29) kasan_check_range (mm/kasan/generic.c:183 mm/kasan/generic.c:189) __sock_gen_cookie (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29) bpf_get_socket_ptr_cookie (./arch/x86/include/asm/preempt.h:94 ./include/linux/sock_diag.h:42 net/core/filter.c:5094 net/core/filter.c:5092) bpf_prog_875642cf11f1d139___sock_release+0x6e/0x8e bpf_trampoline_6442506592+0x47/0xaf __sock_release (net/socket.c:652) __sock_create (net/socket.c:1601) ... Allocated by task 299 on cpu 2 at 78.328492s: kasan_save_stack (mm/kasan/common.c:48) kasan_save_track (mm/kasan/common.c:68) __kasan_slab_alloc (mm/kasan/common.c:312 mm/kasan/common.c:338) kmem_cache_alloc_noprof (mm/slub.c:3941 mm/slub.c:4000 mm/slub.c:4007) sk_prot_alloc (net/core/sock.c:2075) sk_alloc (net/core/sock.c:2134) inet_create (net/ipv4/af_inet.c:327 net/ipv4/af_inet.c:252) __sock_create (net/socket.c:1572) __sys_socket (net/socket.c:1660 net/socket.c:1644 net/socket.c:1706) __x64_sys_socket (net/socket.c:1718) do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Freed by task 299 on cpu 2 at 78.328502s: kasan_save_stack (mm/kasan/common.c:48) kasan_save_track (mm/kasan/common.c:68) kasan_save_free_info (mm/kasan/generic.c:582) poison_slab_object (mm/kasan/common.c:242) __kasan_slab_free (mm/kasan/common.c:256) kmem_cache_free (mm/slub.c:4437 mm/slub.c:4511) __sk_destruct (net/core/sock.c:2117 net/core/sock.c:2208) inet_create (net/ipv4/af_inet.c:397 net/ipv4/af_inet.c:252) __sock_create (net/socket.c:1572) __sys_socket (net/socket.c:1660 net/socket.c:1644 net/socket.c:1706) __x64_sys_socket (net/socket.c:1718) do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Fix this by clearing the struct socket reference in sk_common_release() to cover all protocol families create functions, which may already attached the reference to the sk object with sock_init_data().
Severity ?
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: c5dbb89fc2ac013afe67b9e4fcb3743c02b567cd , < 78e4aa528a7b1204219d808310524344f627d069 (git)
Affected: c5dbb89fc2ac013afe67b9e4fcb3743c02b567cd , < 893eeba94c40d513cd0fe6539330ebdaea208c0e (git)
Affected: c5dbb89fc2ac013afe67b9e4fcb3743c02b567cd , < 454c454ed645fed051216b79622f7cb69c1638f5 (git)
Affected: c5dbb89fc2ac013afe67b9e4fcb3743c02b567cd , < 5dfe2408fd7dc4d2e7ac38a116ff0a37b1cfd3b9 (git)
Affected: c5dbb89fc2ac013afe67b9e4fcb3743c02b567cd , < 6cd4a78d962bebbaf8beb7d2ead3f34120e3f7b2 (git)
Create a notification for this product.
    Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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./include/linux/atomic/atomic-instrumented.h:1611 net/core/sock_diag.c:29)\\nbpf_get_socket_ptr_cookie (./arch/x86/include/asm/preempt.h:94 ./include/linux/sock_diag.h:42 net/core/filter.c:5094 net/core/filter.c:5092)\\nbpf_prog_875642cf11f1d139___sock_release+0x6e/0x8e\\nbpf_trampoline_6442506592+0x47/0xaf\\n__sock_release (net/socket.c:652)\\n__sock_create (net/socket.c:1601)\\n...\\nAllocated by task 299 on cpu 2 at 78.328492s:\\nkasan_save_stack (mm/kasan/common.c:48)\\nkasan_save_track (mm/kasan/common.c:68)\\n__kasan_slab_alloc (mm/kasan/common.c:312 mm/kasan/common.c:338)\\nkmem_cache_alloc_noprof (mm/slub.c:3941 mm/slub.c:4000 mm/slub.c:4007)\\nsk_prot_alloc (net/core/sock.c:2075)\\nsk_alloc (net/core/sock.c:2134)\\ninet_create (net/ipv4/af_inet.c:327 net/ipv4/af_inet.c:252)\\n__sock_create (net/socket.c:1572)\\n__sys_socket (net/socket.c:1660 net/socket.c:1644 net/socket.c:1706)\\n__x64_sys_socket (net/socket.c:1718)\\ndo_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\\n\\nFreed by task 299 on cpu 2 at 78.328502s:\\nkasan_save_stack (mm/kasan/common.c:48)\\nkasan_save_track (mm/kasan/common.c:68)\\nkasan_save_free_info (mm/kasan/generic.c:582)\\npoison_slab_object (mm/kasan/common.c:242)\\n__kasan_slab_free (mm/kasan/common.c:256)\\nkmem_cache_free (mm/slub.c:4437 mm/slub.c:4511)\\n__sk_destruct (net/core/sock.c:2117 net/core/sock.c:2208)\\ninet_create (net/ipv4/af_inet.c:397 net/ipv4/af_inet.c:252)\\n__sock_create (net/socket.c:1572)\\n__sys_socket (net/socket.c:1660 net/socket.c:1644 net/socket.c:1706)\\n__x64_sys_socket (net/socket.c:1718)\\ndo_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\\n\\nFix this by clearing the struct socket reference in sk_common_release() to cover\\nall protocol families create functions, which may already attached the\\nreference to the sk object with sock_init_data().\"}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/core/sock.c\"], \"versions\": [{\"version\": \"c5dbb89fc2ac\", \"lessThan\": \"78e4aa528a7b\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"c5dbb89fc2ac\", \"lessThan\": \"893eeba94c40\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"c5dbb89fc2ac\", \"lessThan\": \"454c454ed645\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"c5dbb89fc2ac\", \"lessThan\": \"5dfe2408fd7d\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"c5dbb89fc2ac\", \"lessThan\": \"6cd4a78d962b\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"net/core/sock.c\"], \"versions\": [{\"version\": \"5.12\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"5.12\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.15.162\", \"lessThanOrEqual\": \"5.15.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.1.96\", \"lessThanOrEqual\": \"6.1.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.6.36\", \"lessThanOrEqual\": \"6.6.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.9.7\", \"lessThanOrEqual\": \"6.9.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"6.10\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/78e4aa528a7b1204219d808310524344f627d069\"}, {\"url\": \"https://git.kernel.org/stable/c/893eeba94c40d513cd0fe6539330ebdaea208c0e\"}, {\"url\": \"https://git.kernel.org/stable/c/454c454ed645fed051216b79622f7cb69c1638f5\"}, {\"url\": \"https://git.kernel.org/stable/c/5dfe2408fd7dc4d2e7ac38a116ff0a37b1cfd3b9\"}, {\"url\": \"https://git.kernel.org/stable/c/6cd4a78d962bebbaf8beb7d2ead3f34120e3f7b2\"}], \"title\": \"net: do not leave a dangling sk pointer, when socket creation fails\", \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}}, \"adp\": [{\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-40954\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:03:48.944366Z\"}}}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2024-09-11T12:42:22.455Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40954\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2024-07-12T12:17:45.592Z\", \"datePublished\": \"2024-07-12T12:31:57.517Z\", \"dateUpdated\": \"2024-08-02T04:39:55.910Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.


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