CVE-2026-52933
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)
io_uring/poll: fix signed comparison in io_poll_get_ownership()
In the Linux kernel, the following vulnerability has been resolved: io_uring/poll: fix signed comparison in io_poll_get_ownership() io_poll_get_ownership() uses a signed comparison to check whether poll_refs has reached the threshold for the slowpath: if (unlikely(atomic_read(&req->poll_refs) >= IO_POLL_REF_BIAS)) atomic_read() returns int (signed). When IO_POLL_CANCEL_FLAG (BIT(31)) is set in poll_refs, the value becomes negative in signed arithmetic, so the >= 128 comparison always evaluates to false and the slowpath is never taken. Fix this by casting the atomic_read() result to unsigned int before the comparison, so that the cancel flag is treated as a large positive value and correctly triggers the slowpath.
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) |
|---|---|---|---|---|---|
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | 81bf96b0abbfa4cd47ea32e12596aed3855fb2f3 | Unavailable | None listed |
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | cf522703d4f194991615763697ae25a3f9539763 | Unavailable | None listed |
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | fc47043f3d9af3efa407665b47f8378ec691ba18 | Unavailable | None listed |
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | ea0697129807d718037f618221037aa0660ee3c5 | Unavailable | None listed |
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | c6d191164dc81838d8dbf452a6000f68c558d1ae | Unavailable | None listed |
| a26a35e9019fd70bf3cf647dcfdae87abc7bacea | affected | git | 326941b22806cbf2df1fbfe902b7908b368cce42 | Unavailable | None listed |
| 4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048 | affected | git | Unavailable | Unavailable | None listed |
| bc4e6ee16778149811333a969a7a893d4cc110c5 | affected | git | Unavailable | Unavailable | None listed |
| 5.15.82 | affected | semver | 5.16 | Unavailable | None listed |
| 6.0.11 | affected | semver | 6.1 | 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) |
|---|---|---|---|---|---|
| 6.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.1 | Unavailable | None listed |
| 6.1.175 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.140 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.86 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.27 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.4 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |