Answer in brief
CVE-2026-52933 records a High severity (CVSS 7.8) vulnerability in io_uring/poll: fix signed comparison in io_poll_get_ownership(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <81bf96b0abbfa4cd47ea32e12596aed3855fb2f3 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <cf522703d4f194991615763697ae25a3f9539763 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <fc47043f3d9af3efa407665b47f8378ec691ba18 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <ea0697129807d718037f618221037aa0660ee3c5 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <c6d191164dc81838d8dbf452a6000f68c558d1ae || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <326941b22806cbf2df1fbfe902b7908b368cce42 || 4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048 || bc4e6ee16778149811333a969a7a893d4cc110c5 || >=5.15.82 <5.16 || >=6.0.11 <6.1 | 81bf96b0abbfa4cd47ea32e12596aed3855fb2f3, cf522703d4f194991615763697ae25a3f9539763, fc47043f3d9af3efa407665b47f8378ec691ba18, ea0697129807d718037f618221037aa0660ee3c5, c6d191164dc81838d8dbf452a6000f68c558d1ae, 326941b22806cbf2df1fbfe902b7908b368cce42, 5.16, 6.1 |
| Linux/Linuxgeneric | 6.1 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-52933 records a High severity (CVSS 7.8) vulnerability in io_uring/poll: fix signed comparison in io_poll_get_ownership(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <81bf96b0abbfa4cd47ea32e12596aed3855fb2f3 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <cf522703d4f194991615763697ae25a3f9539763 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <fc47043f3d9af3efa407665b47f8378ec691ba18 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <ea0697129807d718037f618221037aa0660ee3c5 || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <c6d191164dc81838d8dbf452a6000f68c558d1ae || >=a26a35e9019fd70bf3cf647dcfdae87abc7bacea <326941b22806cbf2df1fbfe902b7908b368cce42 || 4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048 || bc4e6ee16778149811333a969a7a893d4cc110c5 || >=5.15.82 <5.16 || >=6.0.11 <6.1 | 81bf96b0abbfa4cd47ea32e12596aed3855fb2f3, cf522703d4f194991615763697ae25a3f9539763, fc47043f3d9af3efa407665b47f8378ec691ba18, ea0697129807d718037f618221037aa0660ee3c5, c6d191164dc81838d8dbf452a6000f68c558d1ae, 326941b22806cbf2df1fbfe902b7908b368cce42, 5.16, 6.1 |
| Linux/Linuxgeneric | 6.1 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.