AZL-102915
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-102915.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-102915
- Upstream
- Published
- 2026-09-17T17:17:23Z
- Modified
- 2026-09-19T05:33:49Z
- Summary
- CVE-2026-90274 affecting package kernel 6.6.150.1-1
- Details
-
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 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 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 relevant fields setup.
- References