CVE-2026-52922
batman-adv: dat: handle forward allocation error
Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: handle forward allocation error batadv_dat_forward_data() calls pskb_copy_for_clone() to duplicate an skb for each DHT candidate, but does not check the return value before passing it to batadv_send_skb_prepare_unicast_4addr(). That function dereferences the skb unconditionally, so a failed allocation triggers a NULL pointer dereference. Skip forwarding to the current DHT candidate on allocation failure.
INFO
Published Date :
June 24, 2026, 8:16 a.m.
Last Modified :
July 8, 2026, 5:50 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Skip forwarding on skb allocation failure.
- Check return value before using skb.
- Update the Linux kernel.
- Consult vendor advisories for specific patches.
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-2026-52922.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52922 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-2026-52922
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-2026-52922 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52922 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-476 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) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.92 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.142 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.8 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/2d8826a2d3657cea66fb0370f9e521575a673871 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8ef Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4d420d9ee70a220a2cd95aa0dd2e15acad66a505 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/866ac1d57040ed0b44ca732e3c66b3aa6b93011c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9bcebaedfb8479cb4affb23c7a0d000ca9a20e73 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9cceea8eeba710def2a5707ee00f00c74a9a1cac Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ce0c381199402a2c58f4599f4f6ed100d872d0da Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cf48e75fc4fe0d5cc7721c82d454221d01367b93 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 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': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '9bcebaedfb8479cb4affb23c7a0d000ca9a20e73', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8ef', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': 'ce0c381199402a2c58f4599f4f6ed100d872d0da', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '866ac1d57040ed0b44ca732e3c66b3aa6b93011c', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '4d420d9ee70a220a2cd95aa0dd2e15acad66a505', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '9cceea8eeba710def2a5707ee00f00c74a9a1cac', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': 'cf48e75fc4fe0d5cc7721c82d454221d01367b93', 'versionType': 'git'}, {'status': 'affected', 'version': '785ea1144182c341b8b85b0f8180291839d176a8', 'lessThan': '2d8826a2d3657cea66fb0370f9e521575a673871', 'versionType': 'git'}], 'programFiles': ['net/batman-adv/distributed-arp-table.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/batman-adv/distributed-arp-table.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: handle forward allocation error batadv_dat_forward_data() calls pskb_copy_for_clone() to duplicate an skb for each DHT candidate, but does not check the return value before passing it to batadv_send_skb_prepare_unicast_4addr(). That function dereferences the skb unconditionally, so a failed allocation triggers a NULL pointer dereference. Skip forwarding to the current DHT candidate on allocation failure. Added Reference https://git.kernel.org/stable/c/2d8826a2d3657cea66fb0370f9e521575a673871 Added Reference https://git.kernel.org/stable/c/2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8ef Added Reference https://git.kernel.org/stable/c/4d420d9ee70a220a2cd95aa0dd2e15acad66a505 Added Reference https://git.kernel.org/stable/c/866ac1d57040ed0b44ca732e3c66b3aa6b93011c Added Reference https://git.kernel.org/stable/c/9bcebaedfb8479cb4affb23c7a0d000ca9a20e73 Added Reference https://git.kernel.org/stable/c/9cceea8eeba710def2a5707ee00f00c74a9a1cac Added Reference https://git.kernel.org/stable/c/ce0c381199402a2c58f4599f4f6ed100d872d0da Added Reference https://git.kernel.org/stable/c/cf48e75fc4fe0d5cc7721c82d454221d01367b93