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CVE-2026-43249

In the Linux kernel, the following vulnerability has been resolved: 9p/xen: protect xen_9pfs_front_free against concurrent calls The xenwatch thread can race with other back-end change notifications and call xen_9pfs_front_free() twice, hitting the observed general protection fault due to a double-free. Guard the teardown path so only one caller can release the front-end state at a time, preventing the crash. This is a fix for the following double-free: [ 27.052347] Oops: general protectio
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:843b8c037f3e9d577b14766db89c153257cfb3162fd3d9bea6527b7833a0aca0
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":["net/9p/trans_xen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.16","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.6","versionType":"semver"},{"lessThanOrEqua…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/9p/trans_xen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a5d00dff97118a32fcf5fec7a4c3f864c4620c4e","status":"affected","version":"c15fe55d14b3b4ded5af2a3260877460a6ffb8ad","versionType":"git"},{"lessThan":"59e7707492576bdbfa8c1dbe7d90791df31e4773","status":"affected","version":"c15fe55d14b3b4ded5af2a3260877460a6ffb8ad","versionType":"git"},{"lessThan":"bf841d43f7a33d75675ba7f4e214ac1c67913065","status":"affected","version":"c15fe55d14b3b4ded5af2a32608…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["net/9p/trans_xen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.3"},{"lessThan":"6.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.16","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.6","versionType":"semver"},{"lessThanOrEqua…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/9p/trans_xen.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a5d00dff97118a32fcf5fec7a4c3f864c4620c4e","status":"affected","version":"c15fe55d14b3b4ded5af2a3260877460a6ffb8ad","versionType":"git"},{"lessThan":"59e7707492576bdbfa8c1dbe7d90791df31e4773","status":"affected","version":"c15fe55d14b3b4ded5af2a3260877460a6ffb8ad","versionType":"git"},{"lessThan":"bf841d43f7a33d75675ba7f4e214ac1c67913065","status":"affected","version":"c15fe55d14b3b4ded5af2a32608…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/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:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/59e7707492576bdbfa8c1dbe7d90791df31e4773"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/a5d00dff97118a32fcf5fec7a4c3f864c4620c4e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/bf841d43f7a33d75675ba7f4e214ac1c67913065"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/ce8ded2e61f47747e31eeefb44dc24a2160a7e32"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58762070bc93a3c0af173dfda91d740b91fb63fa1ca36617f0d9bc68539f3738 · sha256:3025d107faddcdc9… · /containers/cna/references/3

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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