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CVE-2026-63894

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: serialize DMABUF cancel against request completion ffs_epfile_dmabuf_io_complete() calls usb_ep_free_request() on the completed request but leaves priv->req, the back-pointer that ffs_dmabuf_transfer() set on submission, pointing at the freed memory. A later FUNCTIONFS_DMABUF_DETACH ioctl or ffs_epfile_release() on the close path still sees priv->req non-NULL under ffs->eps_lock: if (priv->ep && priv->
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4612448ba7a75c55b05937b22732029f24af0965733f3bda46fbd324049bd3b9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/gadget/function/f_fs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c872d8a065b3b499ce4c3ad168b5d34b68524f66","status":"affected","version":"7b07a2a7ca02a20124b552be96c5a56910795488","versionType":"git"},{"lessThan":"c7d421123b98d5e9c1c84bd9957aba36f1cbb4ca","status":"affected","version":"7b07a2a7ca02a20124b552be96c5a56910795488","versionType":"git"},{"lessThan":"552dae28dbeb5f7c4fafcda43962dc46569f58a0","status":"affected","version":"7b07a2a7ca0…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/gadget/function/f_fs.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":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/gadget/function/f_fs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c872d8a065b3b499ce4c3ad168b5d34b68524f66","status":"affected","version":"7b07a2a7ca02a20124b552be96c5a56910795488","versionType":"git"},{"lessThan":"c7d421123b98d5e9c1c84bd9957aba36f1cbb4ca","status":"affected","version":"7b07a2a7ca02a20124b552be96c5a56910795488","versionType":"git"},{"lessThan":"552dae28dbeb5f7c4fafcda43962dc46569f58a0","status":"affected","version":"7b07a2a7ca0…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/gadget/function/f_fs.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":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/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:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/2796646f6d892c1eb6818c7ca41fdfa12568e8d1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/552dae28dbeb5f7c4fafcda43962dc46569f58a0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c7d421123b98d5e9c1c84bd9957aba36f1cbb4ca"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/c872d8a065b3b499ce4c3ad168b5d34b68524f66"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cf00752a51f058758c6c1087efe02d6828f848781a204673d8ef3583bd7f5649 · sha256:a78647dfb41d4646… · /containers/cna/references/0

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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