{"schema":"threatline.record/2","record":{"id":"CVE-2026-97989","aliases":[],"summary":"vduse: validate virtqueue alignment","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: validate virtqueue alignment\n\nvduse_validate_config() only checks the upper bound of vq_align. Invalid\nvalues can therefore reach vring_create_virtqueue_map(). The split-ring\nhelpers use align - 1 as a bit mask, so the alignment must be a non-zero\npower of two. A zero value makes vring_size() drop the descriptor and\navailable-ring part and vring_init() leave the used ring pointer NULL.\n\nThe VIRTIO spec requires the used ring to start at an address\naligned to at least 4 bytes. Reject values below VRING_USED_ALIGN_SIZE as\nwell as non-power-of-two values before they reach the virtio ring helpers.\n\nOpening a virtio-net device created with vq_align=0 triggered:\n\nBUG: KASAN: null-ptr-deref in virtqueue_kick_prepare_split+0xe3/0x100\nRead of size 2 at addr 0000000000000000 by task systemd-network/1062\n\nCall Trace (relevant frames):\n dump_stack_lvl\n print_report\n kasan_report\n __asan_load2\n virtqueue_kick_prepare_split+0xe3/0x100\n virtqueue_kick_prepare+0x40/0x60\n try_fill_recv+0x857/0x1250\n virtnet_open+0x189/0x460\n __dev_open+0x225/0x390\n __dev_change_flags+0x368/0x3b0\n netif_change_flags+0x56/0xc0\n do_setlink.isra.0+0x68c/0x1e30\n\nValidate the value before it reaches the virtio ring helpers.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","source_modified_at":"2026-10-21T12:53:59.737Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c8a6153b6c59d95c0e091f053f6f180952ade91e","lessThan":"650bac9c73d3b4d83be683028283654c05346556","status":"affected","versionType":"git"},{"version":"c8a6153b6c59d95c0e091f053f6f180952ade91e","lessThan":"5d4bdca17d87c90b1d888f8846a781a18aa453c9","status":"affected","versionType":"git"},{"version":"c8a6153b6c59d95c0e091f053f6f180952ade91e","lessThan":"831dab9b9bcc184adf78f18b5b788316e3174aec","status":"affected","versionType":"git"},{"version":"c8a6153b6c59d95c0e091f053f6f180952ade91e","lessThan":"c3c3b0839a1197530cc18f535062fc84dbdfc885","status":"affected","versionType":"git"},{"version":"c8a6153b6c59d95c0e091f053f6f180952ade91e","lessThan":"fa2c25b4add57888acfa89e398389e267bff3dcf","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","source_modified_at":"2026-10-21T12:53:59.737Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.114","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","source_modified_at":"2026-10-21T12:53:59.737Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"650bac9c73d3b4d83be683028283654c05346556","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","source_modified_at":"2026-10-21T12:53:59.737Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5d4bdca17d87c90b1d888f8846a781a18aa453c9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","source_modified_at":"2026-10-21T12:53:59.737Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"831dab9b9bcc184adf78f18b5b788316e3174aec","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05755,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:22.620Z","modified_at":"2026-10-21T12:53:59.737Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97989","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:53:59.737Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97989","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/650bac9c73d3b4d83be683028283654c05346556"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5d4bdca17d87c90b1d888f8846a781a18aa453c9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/831dab9b9bcc184adf78f18b5b788316e3174aec"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c3c3b0839a1197530cc18f535062fc84dbdfc885"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/fa2c25b4add57888acfa89e398389e267bff3dcf"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:53:59.737Z","content_hash":"9f53576603b9fd7041d1572c9a3fae523857f9bd85c1a5f0dc1fc9f6e202b3e1"}}