CVE-2026-53275

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: 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:

ipv6: mcast: Fix use-after-free when processing MLD queries

When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being reloaded despite the fact that the skb header might have been reallocated following the pskb_may_pull() calls, leading to a use-after-free [1].

Fix by copying the multicast group address when the packet is initially parsed.

[1] BUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512) Read of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118

Workqueue: mld mld_query_work Call Trace:

dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120) print_address_description.constprop.0 (mm/kasan/report.c:378) print_report (mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:595) __mld_query_work (net/ipv6/mcast.c:1512) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

[...]

Freed by task 118: kasan_save_stack (mm/kasan/common.c:57) kasan_save_track (mm/kasan/common.c:78) kasan_save_free_info (mm/kasan/generic.c:584) __kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285) kfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566) pskb_expand_head (net/core/skbuff.c:2335) __pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4)) __mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1)) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

CVSS v3
8.8
EG Score
8.8(high)
EPSS
16.5%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 30, 2026

Advisory Details (7)

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

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b2eb8886200b907fc71806869620609f0f4cacb0
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4203806f700bb44ea0b05d484d9d40044b47fb04
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7
generic

ipv6: mcast: Fix use-after-free when processing MLD queries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a

Vendor Advisories for CVE-2026-53275(2)

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

Data Freshness Timeline

(refreshed 49× in last 7d / 71× 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 01:23 UTCEG score recompute
  2. 2026-07-07 01:23 UTCVendor advisory
  3. 2026-07-07 01:23 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 12:46 UTCEG score recompute
  7. 2026-07-06 12:46 UTCVendor advisory
  8. 2026-07-06 12:46 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-06 00:08 UTCEG score recompute
  12. 2026-07-06 00:08 UTCVendor advisory
  13. 2026-07-06 00:08 UTCGHSA enrichment
  14. 2026-07-05 11:31 UTCEG score recompute
  15. 2026-07-05 11:31 UTCVendor advisory
  16. 2026-07-05 11:31 UTCGHSA enrichment
  17. 2026-07-05 02:31 UTCEPSS rescore
  18. 2026-07-05 02:30 UTCEPSS rescore
  19. 2026-07-04 22:54 UTCEG score recompute
  20. 2026-07-04 22:54 UTCVendor advisory
  21. 2026-07-04 22:54 UTCGHSA enrichment
  22. 2026-07-04 10:17 UTCEG score recompute
  23. 2026-07-04 10:17 UTCVendor advisory
  24. 2026-07-04 10:16 UTCGHSA enrichment
  25. 2026-07-04 06:31 UTCEPSS rescore
Show 46 more
  1. 2026-07-04 06:31 UTCEPSS rescore
  2. 2026-07-03 21:39 UTCEG score recompute
  3. 2026-07-03 21:39 UTCVendor advisory
  4. 2026-07-03 21:38 UTCGHSA enrichment
  5. 2026-07-03 09:01 UTCEG score recompute
  6. 2026-07-03 09:01 UTCVendor advisory
  7. 2026-07-03 09:00 UTCGHSA enrichment
  8. 2026-07-02 20:22 UTCEG score recompute
  9. 2026-07-02 20:22 UTCVendor advisory
  10. 2026-07-02 20:22 UTCGHSA enrichment
  11. 2026-07-02 07:45 UTCEG score recompute
  12. 2026-07-02 07:45 UTCVendor advisory
  13. 2026-07-02 07:45 UTCGHSA enrichment
  14. 2026-07-01 19:08 UTCEG score recompute
  15. 2026-07-01 19:08 UTCVendor advisory
  16. 2026-07-01 19:08 UTCGHSA enrichment
  17. 2026-07-01 15:07 UTCEPSS rescore
  18. 2026-07-01 06:31 UTCEG score recompute
  19. 2026-07-01 06:31 UTCVendor advisory
  20. 2026-07-01 06:31 UTCGHSA enrichment
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 17:53 UTCEG score recompute
  23. 2026-06-30 17:53 UTCVendor advisory
  24. 2026-06-30 17:53 UTCGHSA enrichment
  25. 2026-06-30 05:16 UTCEG score recompute
  26. 2026-06-30 05:16 UTCVendor advisory
  27. 2026-06-30 05:16 UTCGHSA enrichment
  28. 2026-06-29 16:37 UTCEG score recompute
  29. 2026-06-29 16:37 UTCVendor advisory
  30. 2026-06-29 16:37 UTCGHSA enrichment
  31. 2026-06-29 14:06 UTCEPSS rescore
  32. 2026-06-29 14:06 UTCEPSS rescore
  33. 2026-06-29 04:00 UTCEG score recompute
  34. 2026-06-29 04:00 UTCVendor advisory
  35. 2026-06-29 04:00 UTCGHSA enrichment
  36. 2026-06-28 15:13 UTCEG score recompute▲ 8.80
  37. 2026-06-28 15:13 UTCVendor advisory
  38. 2026-06-28 15:13 UTCGHSA enrichment
  39. 2026-06-28 14:07 UTCEPSS rescore
  40. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  41. 2026-06-28 04:56 UTCEPSS rescore
  42. 2026-06-28 04:56 UTCEPSS rescore
  43. 2026-06-27 03:08 UTCEPSS rescore
  44. 2026-06-25 13:49 UTCEPSS rescore
  45. 2026-06-25 10:03 UTCEG score recompute
  46. 2026-06-25 10:02 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-53275?
CVE-2026-53275 is a high vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being…
When was CVE-2026-53275 disclosed?
CVE-2026-53275 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53275 actively exploited?
CVE-2026-53275 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53275?
CVE-2026-53275 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-53275?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53275, 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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