tracing: Bound synthetic-field strings with seq_buf

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74391
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:41 UTC
Updated2026-08-15 06:22:41 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: tracing: Bound synthetic-field strings with seq_buf The synthetic field helpers build a prefixed synthetic variable name and a generated hist command in fixed MAX_FILTER_STR_VAL buffers. The current code appends those strings with raw strcat(), so long key lists, field names, or saved filters can run past the end of the staging buffers. Build both strings with seq_buf and propagate -E2BIG if either the synthetic variable name or the generated command exceeds MAX_FILTER_STR_VAL. This keeps the existing tracing-side limit while using the helper intended for bounded command construction. [ sdr: Moved struct seq_buf *s for upside-down x-mas tree formatting ]

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 02205a6752f223779a1b0e9e8ffacbea6e717851 0c584c27f6649a93ec12061cc779a4bd8f7c1434 git Not specified
CNA Linux Linux affected 02205a6752f223779a1b0e9e8ffacbea6e717851 88b901fdc1662b131ff908cbd017333b61e7acc8 git Not specified
CNA Linux Linux affected 02205a6752f223779a1b0e9e8ffacbea6e717851 baa333b2700a7fa3529d504529c8c10060fd687c git Not specified
CNA Linux Linux affected 02205a6752f223779a1b0e9e8ffacbea6e717851 cf334620036ad2250e008c7e7bb6646a3938b7b0 git Not specified
CNA Linux Linux affected 02205a6752f223779a1b0e9e8ffacbea6e717851 f07883450eb14d1cf020b55d9f3a7ec5683bcd26 git Not specified
CNA Linux Linux affected 4.17 Not specified
CNA Linux Linux unaffected 4.17 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cf334620036ad2250e008c7e7bb6646a3938b7b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f07883450eb14d1cf020b55d9f3a7ec5683bcd26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/baa333b2700a7fa3529d504529c8c10060fd687c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/88b901fdc1662b131ff908cbd017333b61e7acc8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0c584c27f6649a93ec12061cc779a4bd8f7c1434 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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