CVE-2026-64093batman-adv: tp_meter: directly shut down timer on cleanup
- 8.8HighCVSS base score
- 0.35%Exploitation in 30 daysEPSS · top 71% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: directly shut down timer on cleanup batadv_tp_sender_cleanup() was calling timer_delete_sync() followed by timer_delete() to guard against the timer handler re-arming itself between the two calls. This double-deletion hack relied on the sending status being set to 0 to suppress re-arming. Replace both calls with a single timer_shutdown_sync(). This function both waits for any running timer callback to complete (like timer_delete_sync()) and permanently disarms the timer so it cannot be re-armed afterwards, making re-arming prevention unconditional and self-documenting. The re-arming property is also required because otherwise: 1. context 0 (batadv_tp_recv_ack()) checks in batadv_tp_reset_sender_timer() if sending is still 1 -> it is 2. context 1 changes in batadv_tp_sender_shutdown() sending to 0 and in this process forces the kthread to stop timer in batadv_tp_sender_cleanup() 3. context 0 continues in batadv_tp_reset_sender_timer() and rearms the timer -> but the reference for it is already gone
Timeline
ID reserved
By Linux
Published
- 17 days later
· 17 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < 00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < 74a76634055462833446684fd526d73c290ea43a
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < 5bc2d50fb66b46f86543d5153a188eb1486d0b6e
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < f86b20ec8d17d77bddc02c5c86cfa2389d84ecff
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < 770bf0a35f0620b526fd4193889d1e77084e4c43
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < 933880a8bc9b4042223a79255c0b1021cdc36991
- affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e – < d5487249a81ea658717614009c8f46acc5b7101a
- affected 4.8
- unaffected < 4.8
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.93 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References7
- https://git.kernel.org/stable/c/00bf4bb9947b1190a8be8d9b6a1bcbfa3707785c (opens in a new tab)
- https://git.kernel.org/stable/c/74a76634055462833446684fd526d73c290ea43a (opens in a new tab)
- https://git.kernel.org/stable/c/5bc2d50fb66b46f86543d5153a188eb1486d0b6e (opens in a new tab)
- https://git.kernel.org/stable/c/f86b20ec8d17d77bddc02c5c86cfa2389d84ecff (opens in a new tab)
- https://git.kernel.org/stable/c/770bf0a35f0620b526fd4193889d1e77084e4c43 (opens in a new tab)
- https://git.kernel.org/stable/c/933880a8bc9b4042223a79255c0b1021cdc36991 (opens in a new tab)
- https://git.kernel.org/stable/c/d5487249a81ea658717614009c8f46acc5b7101a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45778 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64093)Record last updated .