CVE-2026-90274

CVE CVE-2026-90274EUVD EUVD-2026-81867Published 2026-09-17T16:08:07.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: coresight: etm4x: fix underflow for usage of (nrseqstate - 1) According to IHI006H Embedded Trace Macrocell Architecture Specification[0], TRCSEQEVR<n> is implemented only when TRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2; otherwise, TRCIDR5.NUMSEQSTATE is 0b000. IOW, the number of usage in the initialisation or setting TRCSEQEVR<n> with drvdata->nrseqstate - 1 in the loop could make underflow issue when TRCIDR5.NUMSEQSTATE is 0b000. Therefore, introduce nr_seq_ctrls field and untie it from nrseqstate. As part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and apply nr_seq_ctrls and above macro to TRCSEQEVR<n> relevant fields setup.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.52; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <4091f2d5b26d117c992ffcce1a5df425a0daedcd; 4.2; patch: 6.12.110; patch: 5.15.221; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <1674d9bff8073bdee5dbc200f56fc3caa28d0566; patch: 6.1.188; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <8d669db59f7283b838e029af29da12e505265fae; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <1ade9a335c69fc735cb7b3f222ed35ab135540fb; patch: 6.6.157; patch: 7.2.6; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <4f9a0f548413bf864f609c9f4bc56e3f1b3577d4; patch: 7.3-rc1; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <5ac900f73ce1d4d8308f40752b51bc8a02b244d2; 2e1cdfe184b5202d51e0611d7a051e2bea303946 <be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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