CVE-2026-80626
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del
In the Linux kernel, the following vulnerability has been resolved: powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the 'out:' label, but only calls the matching get_cpu_var() after the 'i < 0' early-return check. When event->hw.idx is negative the function jumps to 'out:' without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count. On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a 'scheduling while atomic' BUG. Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the 'out:' label only handles perf_pmu_enable.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| a11106544f33c104706ae42d27219a409b67478e | affected | git | c0c7722308c5f303117d8bd555290fdf26b098da | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | 67aeb1eb93d4ffd898a3e74a7f3fe46ee71feb28 | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | 9a515e00b00132b6fc3f1dd62dc5204bbda8cb10 | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | 5397142d60aa29dcf636f5459d960bfc4f97c42a | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | b89477077c834d94381c7bf07d81193bebefcff9 | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | 73711688479df333acc134e3730fff1acba1843e | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | b504fd953664c3f4d176ae8cb594adb3fda9d577 | Unavailable | None listed |
| a11106544f33c104706ae42d27219a409b67478e | affected | git | 81e3a86030462824a67d697739cf3f387f4ba350 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.34 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.34 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |