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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-31657 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by reference batadv_bla_add_claim() can replace claim->backbone_gw and drop the old gateway's last reference while readers still follow the pointer. The netlink claim dump path dereferences claim->backbone_gw->orig and takes claim->backbone_gw->crc_lock without pinning the underlying backbone gateway. batadv_bla_check_claim() still has the same naked pointer access pattern. Reuse batadv_bla_claim_get_backbone_gw() in both readers so they operate on a stable gateway reference until the read-side work is complete. This keeps the dump and claim-check paths aligned with the lifetime rules introduced for the other BLA claim readers.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/1f2dc36c297d27733f1b380ea644cf15a361bd7b kernel.org
https://git.kernel.org/stable/c/2f55b58b5a0bbed192d60c444a45a49cdf1b545f kernel.org
https://git.kernel.org/stable/c/4dee4c0688443aaf5bbec74aa203c851d1d53c35 kernel.org
https://git.kernel.org/stable/c/7962b522222628596ca9ecc8722efc95367aadbd kernel.org
https://git.kernel.org/stable/c/82d8701b2c930d0e96b0dbc9115a218d791cb0d2 kernel.org
https://git.kernel.org/stable/c/f4858832ddef2f39f21e30b7226bbcd3c4b2bc96 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-31657
NVD Published Date:
04/24/2026
NVD Last Modified:
04/24/2026
Source:
kernel.org