wifi: mac80211: shut down RX BA session timer on teardown
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: shut down RX BA session timer on teardown Tearing down an RX BA session can leave the session timer queued on a freed tid_rx. Later timer-wheel processing and the timer callback itself then run against freed memory. An RX BAR handler can dereference tid_rx under RCU before teardown unpublishes it and stay in its read-side critical section while teardown deletes the session timer. The stale handler can then rearm the timer after timer_delete_sync() returns and before the RCU callback frees tid_rx. Use timer_shutdown_sync() so rearm attempts become ineffective once teardown starts. Keep reorder_timer unchanged: teardown marks the session removed under reorder_lock and its release path checks that state before rearming. session_timer has no equivalent guard because ieee80211_rx_h_ctrl() rearms it before taking reorder_lock.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From a87f736d942c86255e3088c606f0e3eab6bbf784 · fixed in d0da6ab1fc53a68025929baf0947519c6c1684dc; From a87f736d942c86255e3088c606f0e3eab6bbf784 · fixed in 7bb2a5bd4f07192fca35644fab7d49a17bfbc861; From a87f736d942c86255e3088c606f0e3eab6bbf784 · fixed in 481f9230284c27052b59c587069f232c5d84779e; From a87f736d942c86255e3088c606f0e3eab6bbf784 · fixed in 09b7d5e4f88504e62ddf4ff31ebeebb3b87578ba; From a87f736d942c86255e3088c606f0e3eab6bbf784 · fixed in e588e83e5c7a0f6d7a77dbbb58927c8c8cfd598e
- Linux Linux
2.6.36
- KernelLinux
From 2.6.36 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.56; From 6.19.0 · fixed in 7.2.10