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CVE-2026-53243

In the Linux kernel, the following vulnerability has been resolved: rseq: Fix using an uninitialized stack variable in rseq_exit_user_update() There is an bug in which an uninitialized stack variable is used in rseq_exit_user_update() as reported by syzbot: BUG: KMSAN: kernel-infoleak in rseq_set_ids_get_csaddr include/linux/rseq_entry.h:502 [inline] The local variable: struct rseq_ids ids = { .cpu_id = task_cpu(t), .mm_cid = task_mm_cid(t), .node_id = cpu_to_node(ids.cpu_id), };
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2bfd2f29e000996a3479c4a170f66f03d8633cf80258e2480f028001242f434f
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":["include/linux/rseq_entry.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7.0.13","status":"affected","version":"7.0.10","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/rseq_entry.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e12d20a63b61aaf9de4772effccf42cc9a003e58","status":"affected","version":"d242126fd21ab8f1631fdbc8589e43a9d4229f3b","versionType":"git"},{"lessThan":"6d99479799c69c3cb588fcda19c81d8f61d64ecd","status":"affected","version":"82f572449cfe75f12ea985986da60e11f308f77d","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/rseq_entry.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7.0.13","status":"affected","version":"7.0.10","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/rseq_entry.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e12d20a63b61aaf9de4772effccf42cc9a003e58","status":"affected","version":"d242126fd21ab8f1631fdbc8589e43a9d4229f3b","versionType":"git"},{"lessThan":"6d99479799c69c3cb588fcda19c81d8f61d64ecd","status":"affected","version":"82f572449cfe75f12ea985986da60e11f308f77d","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /containers/cna/affected/0

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/6d99479799c69c3cb588fcda19c81d8f61d64ecd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/e12d20a63b61aaf9de4772effccf42cc9a003e58"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cfa33839dff7f5ceb3448a8d74833627bdfba79dedec541058118d39fca1e9da · sha256:bd4359355d1d528c… · /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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