CVE-2026-53033 (GCVE-0-2026-53033)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-30 12:09
VLAI
Title
bpf, sockmap: Take state lock for af_unix iter
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Take state lock for af_unix iter When a BPF iterator program updates a sockmap, there is a race condition in unix_stream_bpf_update_proto() where the `peer` pointer can become stale[1] during a state transition TCP_ESTABLISHED -> TCP_CLOSE. CPU0 bpf CPU1 close -------- ---------- // unix_stream_bpf_update_proto() sk_pair = unix_peer(sk) if (unlikely(!sk_pair)) return -EINVAL; // unix_release_sock() skpair = unix_peer(sk); unix_peer(sk) = NULL; sock_put(skpair) sock_hold(sk_pair) // UaF More practically, this fix guarantees that the iterator program is consistently provided with a unix socket that remains stable during iterator execution. [1]: BUG: KASAN: slab-use-after-free in unix_stream_bpf_update_proto+0x155/0x490 Write of size 4 at addr ffff8881178c9a00 by task test_progs/2231 Call Trace: dump_stack_lvl+0x5d/0x80 print_report+0x170/0x4f3 kasan_report+0xe4/0x1c0 kasan_check_range+0x125/0x200 unix_stream_bpf_update_proto+0x155/0x490 sock_map_link+0x71c/0xec0 sock_map_update_common+0xbc/0x600 sock_map_update_elem+0x19a/0x1f0 bpf_prog_bbbf56096cdd4f01_selective_dump_unix+0x20c/0x217 bpf_iter_run_prog+0x21e/0xae0 bpf_iter_unix_seq_show+0x1e0/0x2a0 bpf_seq_read+0x42c/0x10d0 vfs_read+0x171/0xb20 ksys_read+0xff/0x200 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Allocated by task 2236: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x63/0x80 kmem_cache_alloc_noprof+0x1d5/0x680 sk_prot_alloc+0x59/0x210 sk_alloc+0x34/0x470 unix_create1+0x86/0x8a0 unix_stream_connect+0x318/0x15b0 __sys_connect+0xfd/0x130 __x64_sys_connect+0x72/0xd0 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 2236: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x70 __kasan_slab_free+0x47/0x70 kmem_cache_free+0x11c/0x590 __sk_destruct+0x432/0x6e0 unix_release_sock+0x9b3/0xf60 unix_release+0x8a/0xf0 __sock_release+0xb0/0x270 sock_close+0x18/0x20 __fput+0x36e/0xac0 fput_close_sync+0xe5/0x1a0 __x64_sys_close+0x7d/0xd0 do_syscall_64+0xf7/0x5e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-825 - Expired Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3 (git)
Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < d0d124dbcef9318e326956137b31671407094bd4 (git)
Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < 1a59cc6b65fd3ad9915aae5970d859109d4ce9fb (git)
Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < 921920c34cb591947dd30c692500795a69f1e3fa (git)
Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < 98f744d204e5d6fca589cd2c44c3190a0c71697f (git)
Affected: 2c860a43dd77f969bb959336a2f743d7103a8f63 , < 64c2f93fc3254d3bf5de4445fb732ee5c451edb6 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53033\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:14.700\",\"lastModified\":\"2026-06-30T03:20:54.130\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, sockmap: Take state lock for af_unix iter\\n\\nWhen a BPF iterator program updates a sockmap, there is a race condition in\\nunix_stream_bpf_update_proto() where the `peer` pointer can become stale[1]\\nduring a state transition TCP_ESTABLISHED -\u003e TCP_CLOSE.\\n\\n        CPU0 bpf                          CPU1 close\\n        --------                          ----------\\n// unix_stream_bpf_update_proto()\\nsk_pair = unix_peer(sk)\\nif (unlikely(!sk_pair))\\n   return -EINVAL;\\n                                     // unix_release_sock()\\n                                     skpair = unix_peer(sk);\\n                                     unix_peer(sk) = NULL;\\n                                     sock_put(skpair)\\nsock_hold(sk_pair) // UaF\\n\\nMore practically, this fix guarantees that the iterator program is\\nconsistently provided with a unix socket that remains stable during\\niterator execution.\\n\\n[1]:\\nBUG: KASAN: slab-use-after-free in unix_stream_bpf_update_proto+0x155/0x490\\nWrite of size 4 at addr ffff8881178c9a00 by task test_progs/2231\\nCall Trace:\\n dump_stack_lvl+0x5d/0x80\\n print_report+0x170/0x4f3\\n kasan_report+0xe4/0x1c0\\n kasan_check_range+0x125/0x200\\n unix_stream_bpf_update_proto+0x155/0x490\\n sock_map_link+0x71c/0xec0\\n sock_map_update_common+0xbc/0x600\\n sock_map_update_elem+0x19a/0x1f0\\n bpf_prog_bbbf56096cdd4f01_selective_dump_unix+0x20c/0x217\\n bpf_iter_run_prog+0x21e/0xae0\\n bpf_iter_unix_seq_show+0x1e0/0x2a0\\n bpf_seq_read+0x42c/0x10d0\\n vfs_read+0x171/0xb20\\n ksys_read+0xff/0x200\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nAllocated by task 2236:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n __kasan_slab_alloc+0x63/0x80\\n kmem_cache_alloc_noprof+0x1d5/0x680\\n sk_prot_alloc+0x59/0x210\\n sk_alloc+0x34/0x470\\n unix_create1+0x86/0x8a0\\n unix_stream_connect+0x318/0x15b0\\n __sys_connect+0xfd/0x130\\n __x64_sys_connect+0x72/0xd0\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nFreed by task 2236:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n kasan_save_free_info+0x3b/0x70\\n __kasan_slab_free+0x47/0x70\\n kmem_cache_free+0x11c/0x590\\n __sk_destruct+0x432/0x6e0\\n unix_release_sock+0x9b3/0xf60\\n unix_release+0x8a/0xf0\\n __sock_release+0xb0/0x270\\n sock_close+0x18/0x20\\n __fput+0x36e/0xac0\\n fput_close_sync+0xe5/0x1a0\\n __x64_sys_close+0x7d/0xd0\\n do_syscall_64+0xf7/0x5e0\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/unix/af_unix.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"d0d124dbcef9318e326956137b31671407094bd4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"1a59cc6b65fd3ad9915aae5970d859109d4ce9fb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"921920c34cb591947dd30c692500795a69f1e3fa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"98f744d204e5d6fca589cd2c44c3190a0c71697f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2c860a43dd77f969bb959336a2f743d7103a8f63\",\"lessThan\":\"64c2f93fc3254d3bf5de4445fb732ee5c451edb6\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/unix/af_unix.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 6\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:6\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-825\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1a59cc6b65fd3ad9915aae5970d859109d4ce9fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/64c2f93fc3254d3bf5de4445fb732ee5c451edb6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/921920c34cb591947dd30c692500795a69f1e3fa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/98f744d204e5d6fca589cd2c44c3190a0c71697f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0d124dbcef9318e326956137b31671407094bd4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-53033\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2492281\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53033.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}"
  }
}


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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.