Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-63981

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: Fix blockcast recursion bypass leading to stack overflow tcf_mirred_act() checks sched_mirred_nest against MIRRED_NEST_LIMIT (4) to prevent deep recursion. However, when the action uses blockcast (tcfm_blockid != 0), the function returns at the tcf_blockcast() call BEFORE reaching the counter increment. As a result, the recursion counter never advances and the limit check is entirely bypassed. When tw
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f9a84dc8fe7e7282dea1da82c33afc1e9e5506dce444da4d993ea19d57a4d8a1
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":["net/sched/act_mirred.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"25fc9352590f5ef21ebf290432bd768b336693bc","status":"affected","version":"906736728cea480a85803c67fafb1b0e78491922","versionType":"git"},{"lessThan":"34457de389fb64a01fdcc71177dfebe65fd2d362","status":"affected","version":"fe946a751d9b52b7c45ca34899723b314b79b249","versionType":"git"},{"lessThan":"a005fa5d7502eefec7ee6e1c01adadc06de2f9ad","status":"affected","version":"fe946a751d9b52b7c45ca34…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/act_mirred.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:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sched/act_mirred.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"25fc9352590f5ef21ebf290432bd768b336693bc","status":"affected","version":"906736728cea480a85803c67fafb1b0e78491922","versionType":"git"},{"lessThan":"34457de389fb64a01fdcc71177dfebe65fd2d362","status":"affected","version":"fe946a751d9b52b7c45ca34899723b314b79b249","versionType":"git"},{"lessThan":"a005fa5d7502eefec7ee6e1c01adadc06de2f9ad","status":"affected","version":"fe946a751d9b52b7c45ca34…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/act_mirred.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:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/affected/1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/25fc9352590f5ef21ebf290432bd768b336693bc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/34457de389fb64a01fdcc71177dfebe65fd2d362"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/a005fa5d7502eefec7ee6e1c01adadc06de2f9ad"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:018ce2cc14e602779832c639a1b53b24249c587096d6e71aaf0481f4054d47d1 · sha256:6c2ab9e7eebd1a1f… · /containers/cna/references/2

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.

← Back to CVE Explorer