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 — Patch released 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(4)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-18ubuntu
redhatkernel-rt-0:4.18.0-553.164.1.rt7.505.el8_102026-09-17redhat
redhatkernel-0:4.18.0-553.164.1.el8_102026-09-17redhat
redhatkernel-0:5.14.0-687.46.1.el9_82026-09-10redhat
redhatkernel-0:6.12.0-211.52.1.el10_22026-09-08redhat

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

(6)

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 15× in last 7d / 70× 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 320 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 07:28 UTCEG score recompute
  3. 2026-09-18 07:28 UTCVendor advisory
  4. 2026-09-18 07:28 UTCGHSA enrichment
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-14 01:21 UTCEG score recompute
  8. 2026-09-14 01:21 UTCVendor advisory
  9. 2026-09-14 01:21 UTCGHSA enrichment
  10. 2026-09-13 16:47 UTCEPSS rescore
  11. 2026-09-13 09:40 UTCVendor advisory
  12. 2026-09-13 09:40 UTCGHSA enrichment
  13. 2026-09-12 15:51 UTCEG score recompute
  14. 2026-09-12 15:51 UTCVendor advisory
  15. 2026-09-12 15:51 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-08 22:01 UTCEPSS rescore
  19. 2026-09-08 09:43 UTCEG score recompute
  20. 2026-09-08 09:43 UTCVendor advisory
  21. 2026-09-08 09:43 UTCGHSA enrichment
  22. 2026-09-08 08:57 UTCEG score recompute
  23. 2026-09-08 08:57 UTCVendor advisory
  24. 2026-09-08 08:57 UTCGHSA enrichment
  25. 2026-09-07 16:01 UTCEPSS rescore
Show 75 more
  1. 2026-09-06 13:47 UTCEPSS rescore
  2. 2026-09-04 05:06 UTCEPSS rescore
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-02 13:36 UTCEG score recompute
  5. 2026-09-02 13:36 UTCVendor advisory
  6. 2026-09-02 13:36 UTCGHSA enrichment
  7. 2026-09-02 12:56 UTCEG score recompute
  8. 2026-09-02 12:56 UTCVendor advisory
  9. 2026-09-02 12:56 UTCGHSA enrichment
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 19:36 UTCEG score recompute
  13. 2026-08-30 19:36 UTCVendor advisory
  14. 2026-08-30 19:36 UTCGHSA enrichment
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-27 23:56 UTCEG score recompute
  19. 2026-08-27 23:56 UTCVendor advisory
  20. 2026-08-27 23:56 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-25 01:48 UTCEG score recompute
  25. 2026-08-25 01:48 UTCGHSA enrichment
  26. 2026-08-24 13:11 UTCEG score recompute
  27. 2026-08-24 13:11 UTCVendor advisory
  28. 2026-08-24 13:11 UTCGHSA enrichment
  29. 2026-08-24 00:30 UTCVendor advisory
  30. 2026-08-24 00:30 UTCGHSA enrichment
  31. 2026-08-23 11:53 UTCVendor advisory
  32. 2026-08-23 11:53 UTCGHSA enrichment
  33. 2026-08-22 23:16 UTCVendor advisory
  34. 2026-08-22 23:16 UTCGHSA enrichment
  35. 2026-08-22 10:39 UTCEG score recompute
  36. 2026-08-22 10:39 UTCVendor advisory
  37. 2026-08-22 10:39 UTCGHSA enrichment
  38. 2026-08-21 23:49 UTCEPSS rescore
  39. 2026-08-21 20:57 UTCGHSA enrichment
  40. 2026-08-21 08:20 UTCEG score recompute
  41. 2026-08-21 08:20 UTCVendor advisory
  42. 2026-08-21 08:20 UTCGHSA enrichment
  43. 2026-08-20 22:55 UTCEPSS rescore
  44. 2026-08-20 19:43 UTCVendor advisory
  45. 2026-08-20 19:43 UTCGHSA enrichment
  46. 2026-08-20 07:05 UTCEG score recompute
  47. 2026-08-20 07:05 UTCVendor advisory
  48. 2026-08-20 07:05 UTCGHSA enrichment
  49. 2026-08-19 17:04 UTCEPSS rescore
  50. 2026-08-19 14:14 UTCVendor advisory
  51. 2026-08-19 14:14 UTCGHSA enrichment
  52. 2026-08-19 01:29 UTCEG score recompute
  53. 2026-08-19 01:29 UTCVendor advisory
  54. 2026-08-19 01:29 UTCGHSA enrichment
  55. 2026-08-18 13:48 UTCEPSS rescore
  56. 2026-08-17 16:57 UTCEG score recompute
  57. 2026-08-17 16:57 UTCVendor advisory
  58. 2026-08-17 16:57 UTCGHSA enrichment
  59. 2026-08-17 13:47 UTCEPSS rescore
  60. 2026-08-17 03:38 UTCVendor advisory
  61. 2026-08-17 03:38 UTCGHSA enrichment
  62. 2026-08-16 15:01 UTCEG score recompute
  63. 2026-08-16 15:01 UTCVendor advisory
  64. 2026-08-16 15:01 UTCGHSA enrichment
  65. 2026-08-16 14:56 UTCEPSS rescore
  66. 2026-08-16 02:24 UTCEG score recompute
  67. 2026-08-16 02:24 UTCVendor advisory
  68. 2026-08-16 02:24 UTCGHSA enrichment
  69. 2026-08-16 02:14 UTCEPSS rescore
  70. 2026-08-15 13:47 UTCEG score recompute
  71. 2026-08-15 13:47 UTCVendor advisory
  72. 2026-08-15 13:47 UTCGHSA enrichment
  73. 2026-08-15 01:30 UTCEPSS rescore
  74. 2026-08-15 00:51 UTCVendor advisory
  75. 2026-08-15 00:51 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 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 82.6% 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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