- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% 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: net: openvswitch: fix use-after-free of the flow table mask array tbl_mask_array_realloc() retires the old mask_array before it stops being reachable: old = ovsl_dereference(tbl->mask_array); if (old) { ... call_rcu(&old->rcu, mask_array_rcu_cb); } rcu_assign_pointer(tbl->mask_array, new); call_rcu() only waits for read-side critical sections already in flight. tbl->mask_array still points at old between the call_rcu() and the rcu_assign_pointer(), so a reader entering ovs_flow_tbl_lookup_stats() in that window picks up old in a fresh critical section that the pending grace period does not cover. tbl_mask_array_realloc() runs in process context under ovs_mutex, so the window is preemptible and can outlast the grace period. Then mask_array_rcu_cb() frees old before the swap runs: BUG: KASAN: slab-use-after-free in flow_lookup.constprop.0+0x2bf/0x2f0 Read of size 8 at addr ffff888020b3e018 by task poc/741 flow_lookup.constprop.0+0x2bf/0x2f0 ovs_flow_tbl_lookup_stats+0x4a3/0x5c0 ovs_dp_process_packet+0x19c/0x710 ovs_vport_receive+0x243/0x390 internal_dev_xmit+0x81/0x170 Freed by task 728: kfree+0x16a/0x4e0 rcu_core+0x853/0x1030 Publish the new array before retiring the old one. The kfree_rcu() that call_rcu() replaced ran after the swap.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 24 days later
· 24 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < 4c98b492e9ed63f9ca3e23566d9a6a4f235944f4
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < 4016ead17acd75312c066ecd47c4b7f0a81ceaa2
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < 017dbbf0d6c319a487f68e22f56d91fc787d5525
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < 76678217cdabc41e3c74c23b45b62086ffb8fe7a
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < cd982e11684def5d4a9fcfd5354de09032828414
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < a0d18d21d48a551f82ee344e50efb8a682161489
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < 035e9c3722067648a99010711d0ce81f42572ef4
- affected eac87c413bf9794c14d488998a5265ea5b32f04e – < ba4ba11ed6eb8972c69070417fc27b48deb002e8
- affected 5.9
- unaffected < 5.9
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/4c98b492e9ed63f9ca3e23566d9a6a4f235944f4 (opens in a new tab)
- https://git.kernel.org/stable/c/4016ead17acd75312c066ecd47c4b7f0a81ceaa2 (opens in a new tab)
- https://git.kernel.org/stable/c/017dbbf0d6c319a487f68e22f56d91fc787d5525 (opens in a new tab)
- https://git.kernel.org/stable/c/76678217cdabc41e3c74c23b45b62086ffb8fe7a (opens in a new tab)
- https://git.kernel.org/stable/c/cd982e11684def5d4a9fcfd5354de09032828414 (opens in a new tab)
- https://git.kernel.org/stable/c/a0d18d21d48a551f82ee344e50efb8a682161489 (opens in a new tab)
- https://git.kernel.org/stable/c/035e9c3722067648a99010711d0ce81f42572ef4 (opens in a new tab)
- https://git.kernel.org/stable/c/ba4ba11ed6eb8972c69070417fc27b48deb002e8 (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-2026-86742 (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-2026-97611)Record last updated .