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.
References
Configurations
Configuration 1 (hide)
|
History
08 Jul 2026, 15:28
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42 - Patch | |
| References | () https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3 - Patch | |
| References | () https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae - Patch | |
| References | () https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763 - Patch | |
| References | () https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5 - Patch | |
| References | () https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-835 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:* |
28 Jun 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
24 Jun 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-24 08:16
Updated : 2026-07-08 15:28
NVD link : CVE-2026-52933
Mitre link : CVE-2026-52933
CVE.ORG link : CVE-2026-52933
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')