CVE-2026-97989vduse: validate virtqueue alignment
- —Not scoredno CVSS score yet
- 0.17%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: vduse: validate virtqueue alignment vduse_validate_config() only checks the upper bound of vq_align. Invalid values can therefore reach vring_create_virtqueue_map(). The split-ring helpers use align - 1 as a bit mask, so the alignment must be a non-zero power of two. A zero value makes vring_size() drop the descriptor and available-ring part and vring_init() leave the used ring pointer NULL. The VIRTIO spec requires the used ring to start at an address aligned to at least 4 bytes. Reject values below VRING_USED_ALIGN_SIZE as well as non-power-of-two values before they reach the virtio ring helpers. Opening a virtio-net device created with vq_align=0 triggered: BUG: KASAN: null-ptr-deref in virtqueue_kick_prepare_split+0xe3/0x100 Read of size 2 at addr 0000000000000000 by task systemd-network/1062 Call Trace (relevant frames): dump_stack_lvl print_report kasan_report __asan_load2 virtqueue_kick_prepare_split+0xe3/0x100 virtqueue_kick_prepare+0x40/0x60 try_fill_recv+0x857/0x1250 virtnet_open+0x189/0x460 __dev_open+0x225/0x390 __dev_change_flags+0x368/0x3b0 netif_change_flags+0x56/0xc0 do_setlink.isra.0+0x68c/0x1e30 Validate the value before it reaches the virtio ring helpers.
Timeline
ID reserved
By Linux
Published
- 26 days later
· 26 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected c8a6153b6c59d95c0e091f053f6f180952ade91e – < 650bac9c73d3b4d83be683028283654c05346556
- affected c8a6153b6c59d95c0e091f053f6f180952ade91e – < 5d4bdca17d87c90b1d888f8846a781a18aa453c9
- affected c8a6153b6c59d95c0e091f053f6f180952ade91e – < 831dab9b9bcc184adf78f18b5b788316e3174aec
- affected c8a6153b6c59d95c0e091f053f6f180952ade91e – < c3c3b0839a1197530cc18f535062fc84dbdfc885
- affected c8a6153b6c59d95c0e091f053f6f180952ade91e – < fa2c25b4add57888acfa89e398389e267bff3dcf
- affected 5.15
- unaffected < 5.15
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/650bac9c73d3b4d83be683028283654c05346556 (opens in a new tab)
- https://git.kernel.org/stable/c/5d4bdca17d87c90b1d888f8846a781a18aa453c9 (opens in a new tab)
- https://git.kernel.org/stable/c/831dab9b9bcc184adf78f18b5b788316e3174aec (opens in a new tab)
- https://git.kernel.org/stable/c/c3c3b0839a1197530cc18f535062fc84dbdfc885 (opens in a new tab)
- https://git.kernel.org/stable/c/fa2c25b4add57888acfa89e398389e267bff3dcf (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-2026-86643 (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-2026-97989)Record last updated .