AZL-90338
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-90338.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-90338
- Upstream
- Published
- 2026-06-24T08:16:21Z
- Modified
- 2026-08-28T17:48:11.326784058Z
- Summary
- CVE-2026-52919 affecting package kernel for versions less than 6.6.143.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: fix tp_meter counter underflow during shutdown
batadvtpsender_shutdown() unconditionally decrements the "sending" atomic counter. If multiple paths (e.g. timeout, user cancel, and normal finish) call this function, the counter can underflow to -1.
Since the sender logic treats any non-zero value as "still sending", a negative value causes the sender kthread to loop indefinitely. This leads to a use-after-free when the interface is removed while the zombie thread is still active.
Fix this by using atomic_xchg() to ensure the counter only transitions from 1 to 0 once.
[sven: added missing change in batadvtpsend]
- References