CVE Explorer

CVE-2026-31718

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in __ksmbd_close_fd() via durable scavenger When a durable file handle survives session disconnect (TCP close without SMB2_LOGOFF), session_fd_check() sets fp->conn = NULL to preserve the handle for later reconnection. However, it did not clean up the byte-range locks on fp->lock_list. Later, when the durable scavenger thread times out and calls __ksmbd_close_fd(NULL, fp), the lock cleanup loop did:

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4db43cf5a69f9284cef057ac526686b5e906790b2537489ff3d3e78b25c39354

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.9"},{"lessThan":"6.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.25","versionType":"semver"},{"lessTha…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0000a7780e0e446a28a273572f6ea8f7f582f694","status":"affected","version":"8df4bcdb0a4232192b2445256c39b787d58ef14d","versionType":"git"},{"lessThan":"e33c65f011980b4ad4abfd93585ec2079856368f","status":"affected","version":"c8efcc786146a951091588e5fa7e3c754850cb3c","versionType":"git"},{"lessThan":"3d6682726c2d3a46d31dae88b8166786b09b03ad","status":"affected","version":"c8efcc786146a9510915…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/affected/0

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/affected/1

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/metrics/0/cvssV3_1

Source references

5 source assertions

{"url":"https://git.kernel.org/stable/c/0000a7780e0e446a28a273572f6ea8f7f582f694"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/235e32320a470fcd3998fb3774f2290a0eb302a1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/3d6682726c2d3a46d31dae88b8166786b09b03ad"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/b34fc42cfe922e551f7a27d3ac3bb016e41d7dd9"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/e33c65f011980b4ad4abfd93585ec2079856368f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:e29ec000c828befba02a7a10ab8df8afd6553312e08f0d7e910d5458752c948f · sha256:f92962ef3b55b3d9… · /containers/cna/references/1

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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