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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-74391

tracing: Bound synthetic-field strings with seq_buf

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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 ]

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < 9f8ef2e1e95a42044e614b0a5277e3f53f545135affected
  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < 0c584c27f6649a93ec12061cc779a4bd8f7c1434affected
  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < 88b901fdc1662b131ff908cbd017333b61e7acc8affected
  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < baa333b2700a7fa3529d504529c8c10060fd687caffected
  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < cf334620036ad2250e008c7e7bb6646a3938b7b0affected
  • 02205a6752f223779a1b0e9e8ffacbea6e717851 to < f07883450eb14d1cf020b55d9f3a7ec5683bcd26affected

Linux Linux

Default version status: affected

  • 4.17affected
  • 0 to < 4.17unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References