CVE-2026-53033

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
7.8
EG Score
7.8(high)
EPSS
3.0%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 6, 2026

Advisory Details (6)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0d124dbcef9318e326956137b31671407094bd4
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/98f744d204e5d6fca589cd2c44c3190a0c71697f
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/921920c34cb591947dd30c692500795a69f1e3fa
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/64c2f93fc3254d3bf5de4445fb732ee5c451edb6
generic

bpf, sockmap: Take state lock for af_unix iter - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a59cc6b65fd3ad9915aae5970d859109d4ce9fb

Vendor Advisories for CVE-2026-53033(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 33× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 02:19 UTCEG score recompute
  2. 2026-07-07 02:18 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 13:20 UTCEG score recompute
  6. 2026-07-06 13:20 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 00:25 UTCEG score recompute
  10. 2026-07-06 00:25 UTCGHSA enrichment
  11. 2026-07-05 11:40 UTCEG score recompute
  12. 2026-07-05 11:40 UTCGHSA enrichment
  13. 2026-07-04 22:56 UTCEG score recompute
  14. 2026-07-04 22:56 UTCGHSA enrichment
  15. 2026-07-04 10:13 UTCEG score recompute
  16. 2026-07-04 10:12 UTCGHSA enrichment
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-03 21:30 UTCEG score recompute
  19. 2026-07-03 21:30 UTCGHSA enrichment
  20. 2026-07-03 08:47 UTCEG score recompute
  21. 2026-07-03 08:47 UTCGHSA enrichment
  22. 2026-07-02 20:05 UTCEG score recompute
  23. 2026-07-02 20:04 UTCGHSA enrichment
  24. 2026-07-02 07:22 UTCEG score recompute
  25. 2026-07-02 07:22 UTCGHSA enrichment
Show 20 more
  1. 2026-07-01 18:40 UTCEG score recompute
  2. 2026-07-01 18:40 UTCGHSA enrichment
  3. 2026-07-01 15:07 UTCEPSS rescore
  4. 2026-07-01 05:58 UTCEG score recompute
  5. 2026-07-01 05:58 UTCGHSA enrichment
  6. 2026-06-30 23:22 UTCEPSS rescore
  7. 2026-06-30 17:16 UTCEG score recompute▲ 7.80
  8. 2026-06-30 17:16 UTCGHSA enrichment
  9. 2026-06-29 14:06 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-27 17:43 UTCEG score recompute
  16. 2026-06-27 17:43 UTCGHSA enrichment
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-24 18:19 UTCEG score recompute
  20. 2026-06-24 18:02 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53033?
CVE-2026-53033 is a high vulnerability published on June 24, 2026. 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 unixstreambpfupdateproto() where the peer pointer can become stale[1] during a state transition…
When was CVE-2026-53033 disclosed?
CVE-2026-53033 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53033 actively exploited?
CVE-2026-53033 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53033?
CVE-2026-53033 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-53033?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53033, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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