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CVE-2026-63951

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_writeback_endio A crash was observed in zram_writeback_endio due to a NULL pointer dereference in wake_up. The root cause is a race condition between the bio completion handler (zram_writeback_endio) and the writeback task. In zram_writeback_endio, wake_up() is called on &wb_ctl->done_wait after releasing wb_ctl->done_lock. This creates a race window where the writeback task can see num_infl
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:de8b97b74cd7bcbb62d2d65214c4069b13e1b9c0b7720c76e625a34b8a8845f4
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":["drivers/block/zram/zram_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/block/zram/zram_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ebe2cbefc86291fa7f386447a81995640df4e2fd","status":"affected","version":"f405066a1f0db818270f49a5e96be329bcabde1e","versionType":"git"},{"lessThan":"bf62f69574b19720ae5fbbbcdf24a0c4e3e05e43","status":"affected","version":"f405066a1f0db818270f49a5e96be329bcabde1e","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/block/zram/zram_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/block/zram/zram_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ebe2cbefc86291fa7f386447a81995640df4e2fd","status":"affected","version":"f405066a1f0db818270f49a5e96be329bcabde1e","versionType":"git"},{"lessThan":"bf62f69574b19720ae5fbbbcdf24a0c4e3e05e43","status":"affected","version":"f405066a1f0db818270f49a5e96be329bcabde1e","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/affected/0

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:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/bf62f69574b19720ae5fbbbcdf24a0c4e3e05e43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/ebe2cbefc86291fa7f386447a81995640df4e2fd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:81b8ccd478961561dc1ccdfe0273345af274678ecc415bdfac1625518e843de5 · sha256:ed3a12e68bdb58e8… · /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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