CVE-2026-53275

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

June 25, 2026

Last Modified

September 8, 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(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-08ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-08ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-08ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 95× 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.

Showing the most recent 100 of 305 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 09:43 UTCEG score recompute
  5. 2026-09-08 09:43 UTCVendor advisory
  6. 2026-09-08 09:43 UTCGHSA enrichment
  7. 2026-09-08 08:57 UTCEG score recompute
  8. 2026-09-08 08:57 UTCVendor advisory
  9. 2026-09-08 08:57 UTCGHSA enrichment
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-02 13:36 UTCEG score recompute
  15. 2026-09-02 13:36 UTCVendor advisory
  16. 2026-09-02 13:36 UTCGHSA enrichment
  17. 2026-09-02 12:56 UTCEG score recompute
  18. 2026-09-02 12:56 UTCVendor advisory
  19. 2026-09-02 12:56 UTCGHSA enrichment
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-09-01 04:40 UTCEPSS rescore
  22. 2026-08-30 19:36 UTCEG score recompute
  23. 2026-08-30 19:36 UTCVendor advisory
  24. 2026-08-30 19:36 UTCGHSA enrichment
  25. 2026-08-30 19:17 UTCEPSS rescore
Show 75 more
  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-28 21:41 UTCEPSS rescore
  3. 2026-08-27 23:56 UTCEG score recompute
  4. 2026-08-27 23:56 UTCVendor advisory
  5. 2026-08-27 23:56 UTCGHSA enrichment
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-25 01:48 UTCEG score recompute
  10. 2026-08-25 01:48 UTCGHSA enrichment
  11. 2026-08-24 13:11 UTCEG score recompute
  12. 2026-08-24 13:11 UTCVendor advisory
  13. 2026-08-24 13:11 UTCGHSA enrichment
  14. 2026-08-24 00:30 UTCVendor advisory
  15. 2026-08-24 00:30 UTCGHSA enrichment
  16. 2026-08-23 11:53 UTCVendor advisory
  17. 2026-08-23 11:53 UTCGHSA enrichment
  18. 2026-08-22 23:16 UTCVendor advisory
  19. 2026-08-22 23:16 UTCGHSA enrichment
  20. 2026-08-22 10:39 UTCEG score recompute
  21. 2026-08-22 10:39 UTCVendor advisory
  22. 2026-08-22 10:39 UTCGHSA enrichment
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 20:57 UTCGHSA enrichment
  25. 2026-08-21 08:20 UTCEG score recompute
  26. 2026-08-21 08:20 UTCVendor advisory
  27. 2026-08-21 08:20 UTCGHSA enrichment
  28. 2026-08-20 22:55 UTCEPSS rescore
  29. 2026-08-20 19:43 UTCVendor advisory
  30. 2026-08-20 19:43 UTCGHSA enrichment
  31. 2026-08-20 07:05 UTCEG score recompute
  32. 2026-08-20 07:05 UTCVendor advisory
  33. 2026-08-20 07:05 UTCGHSA enrichment
  34. 2026-08-19 17:04 UTCEPSS rescore
  35. 2026-08-19 14:14 UTCVendor advisory
  36. 2026-08-19 14:14 UTCGHSA enrichment
  37. 2026-08-19 01:29 UTCEG score recompute
  38. 2026-08-19 01:29 UTCVendor advisory
  39. 2026-08-19 01:29 UTCGHSA enrichment
  40. 2026-08-18 13:48 UTCEPSS rescore
  41. 2026-08-17 16:57 UTCEG score recompute
  42. 2026-08-17 16:57 UTCVendor advisory
  43. 2026-08-17 16:57 UTCGHSA enrichment
  44. 2026-08-17 13:47 UTCEPSS rescore
  45. 2026-08-17 03:38 UTCVendor advisory
  46. 2026-08-17 03:38 UTCGHSA enrichment
  47. 2026-08-16 15:01 UTCEG score recompute
  48. 2026-08-16 15:01 UTCVendor advisory
  49. 2026-08-16 15:01 UTCGHSA enrichment
  50. 2026-08-16 14:56 UTCEPSS rescore
  51. 2026-08-16 02:24 UTCEG score recompute
  52. 2026-08-16 02:24 UTCVendor advisory
  53. 2026-08-16 02:24 UTCGHSA enrichment
  54. 2026-08-16 02:14 UTCEPSS rescore
  55. 2026-08-15 13:47 UTCEG score recompute
  56. 2026-08-15 13:47 UTCVendor advisory
  57. 2026-08-15 13:47 UTCGHSA enrichment
  58. 2026-08-15 01:30 UTCEPSS rescore
  59. 2026-08-15 00:51 UTCVendor advisory
  60. 2026-08-15 00:51 UTCGHSA enrichment
  61. 2026-08-14 12:14 UTCVendor advisory
  62. 2026-08-14 12:14 UTCGHSA enrichment
  63. 2026-08-13 23:38 UTCEG score recompute
  64. 2026-08-13 23:38 UTCVendor advisory
  65. 2026-08-13 23:38 UTCGHSA enrichment
  66. 2026-08-13 22:00 UTCEPSS rescore
  67. 2026-08-13 10:56 UTCVendor advisory
  68. 2026-08-13 10:56 UTCGHSA enrichment
  69. 2026-08-12 22:19 UTCEG score recompute
  70. 2026-08-12 22:19 UTCGHSA enrichment
  71. 2026-08-12 13:51 UTCEPSS rescore
  72. 2026-08-12 09:42 UTCVendor advisory
  73. 2026-08-12 09:42 UTCGHSA enrichment
  74. 2026-08-11 21:05 UTCEG score recompute
  75. 2026-08-11 21:05 UTCVendor advisory

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 September 8, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 83.0% of all scored CVEs.
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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