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CVE-2026-63804

In the Linux kernel, the following vulnerability has been resolved: gfs2: fix use-after-free in gfs2_qd_dealloc gfs2_qd_dealloc(), called as an RCU callback from gfs2_qd_dispose(), accesses the superblock object sdp through qd->qd_sbd after freeing qd. It does so to decrement sd_quota_count and wake up sd_kill_wait. However, by the time the RCU callback runs, gfs2_put_super() may have already freed sdp via free_sbd(). This can happen when gfs2_quota_cleanup() is called during unmount: it dis
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ff5657387beb06fd6965b71f5dd3b8c279468e278ded4b089afba0b440ff2ebc
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":"affected","product":"Linux","programFiles":["fs/gfs2/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.144","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.95","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.38","versionType":"semver"},{"lessThanOrEqual":…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/gfs2/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4fe388218826df8607ae41a6305df67db08a9093","status":"affected","version":"a475c5dd16e57c570113eccba51955b5df8bb052","versionType":"git"},{"lessThan":"8745d9f7e1682c39f0a1578895ac74205e2a6757","status":"affected","version":"a475c5dd16e57c570113eccba51955b5df8bb052","versionType":"git"},{"lessThan":"b85ef03f726b15047a6fa6d11b639bdf6c0ee4f0","status":"affected","version":"a475c5dd16e57c570113eccba51955…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/gfs2/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.144","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.95","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.38","versionType":"semver"},{"lessThanOrEqual":…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/gfs2/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4fe388218826df8607ae41a6305df67db08a9093","status":"affected","version":"a475c5dd16e57c570113eccba51955b5df8bb052","versionType":"git"},{"lessThan":"8745d9f7e1682c39f0a1578895ac74205e2a6757","status":"affected","version":"a475c5dd16e57c570113eccba51955b5df8bb052","versionType":"git"},{"lessThan":"b85ef03f726b15047a6fa6d11b639bdf6c0ee4f0","status":"affected","version":"a475c5dd16e57c570113eccba51955…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/affected/0

Source references

5 source assertions
{"url":"https://git.kernel.org/stable/c/4fe388218826df8607ae41a6305df67db08a9093"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/8745d9f7e1682c39f0a1578895ac74205e2a6757"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/9d0d5ba20cad661f7f287d4c66d2c19022ce2fd0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/b85ef03f726b15047a6fa6d11b639bdf6c0ee4f0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/f9c9ec2c319f843b70ecdf939d48b52d189bc081"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:175f660ccd0b3cdc8fa00905909f457fe6028dff0e6eeb9cf4c4411797d4160b · sha256:1b0530755d32855d… · /containers/cna/references/4

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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