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Improper Validation of Specified Index, Position, or Offset in Input The advisory has been revoked - it doesn't affect any version of package libperf  (opens in a new tab)

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0.02% (5th percentile)

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  • Snyk IDSNYK-RHEL10-LIBPERF-15292681
  • published17 Feb 2026
  • disclosed14 Feb 2026
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Introduced: 14 Feb 2026

CVE-2026-23204  (opens in a new tab)
CWE-1285  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by RHEL.

In the Linux kernel, the following vulnerability has been resolved:

net/sched: cls_u32: use skb_header_pointer_careful()

skb_header_pointer() does not fully validate negative @offset values.

Use skb_header_pointer_careful() instead.

GangMin Kim provided a report and a repro fooling u32_classify():

BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0 net/sched/cls_u32.c:221