1. Home
  2. Vulnerabilities
  3. CVE-2026-53275
8.8
HIGH CVSS 3.1
CVE-2026-53275
ipv6: mcast: Fix use-after-free when processing MLD queries
Overview
Description

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: <TASK> 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) </TASK> [...] 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)

Details
INFO

Published Date :

June 25, 2026, 9:16 a.m.

Last Modified :

July 8, 2026, 4 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-53275 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-53275.

URL Resource
https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a Patch
https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7 Patch
https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea Patch
https://git.kernel.org/stable/c/4203806f700bb44ea0b05d484d9d40044b47fb04 Patch
https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4 Patch
https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40 Patch
https://git.kernel.org/stable/c/b2eb8886200b907fc71806869620609f0f4cacb0 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-53275 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-53275 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-53275 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-53275 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jul. 08, 2026

    Action Type Old Value New Value
    Added CWE CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.15 up to (excluding) 5.15.210
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/4203806f700bb44ea0b05d484d9d40044b47fb04 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/b2eb8886200b907fc71806869620609f0f4cacb0 Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 28, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '1354271c89d0e5fbf8b3d94097ff0216695209c7', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '53baa63a4183291574483f89583dbef13677a2c4', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '2a613bf497029d555a7428406aa8cdb84a503cea', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': 'b2eb8886200b907fc71806869620609f0f4cacb0', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '4203806f700bb44ea0b05d484d9d40044b47fb04', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '087dbacf897c020f438f780f0a4a8aa73b6d7c5a', 'versionType': 'git'}, {'status': 'affected', 'version': '97300b5fdfe28c6edae926926f9467a27cf5889c', 'lessThan': '791c91dc7a9dfb2457d5e29b8216a6484b9c4b40', 'versionType': 'git'}], 'programFiles': ['net/ipv6/mcast.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ipv6/mcast.c'], 'defaultStatus': 'affected'}]
    Added Description 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: <TASK> 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) </TASK> [...] 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)
    Added Reference https://git.kernel.org/stable/c/087dbacf897c020f438f780f0a4a8aa73b6d7c5a
    Added Reference https://git.kernel.org/stable/c/1354271c89d0e5fbf8b3d94097ff0216695209c7
    Added Reference https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea
    Added Reference https://git.kernel.org/stable/c/4203806f700bb44ea0b05d484d9d40044b47fb04
    Added Reference https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4
    Added Reference https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40
    Added Reference https://git.kernel.org/stable/c/b2eb8886200b907fc71806869620609f0f4cacb0
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact