CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
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.
Засегнати продукти
- Linux Linux: a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди 81bf96b0abbfa4cd47ea32e12596aed3855fb2f3; a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди cf522703d4f194991615763697ae25a3f9539763; a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди fc47043f3d9af3efa407665b47f8378ec691ba18; a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди ea0697129807d718037f618221037aa0660ee3c5; a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди c6d191164dc81838d8dbf452a6000f68c558d1ae; a26a35e9019fd70bf3cf647dcfdae87abc7bacea преди 326941b22806cbf2df1fbfe902b7908b368cce42; 4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048; bc4e6ee16778149811333a969a7a893d4cc110c5; 5.15.82 преди 5.16; 6.0.11 преди 6.1
- Linux Linux: 6.1; преди 6.1; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; от 7.1 нататък
Siemens: още 3 продукта, добавени от Siemens
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Вид слабост
История
- 24 юни 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-52933
- https://nvd.nist.gov/vuln/detail/CVE-2026-52933
- https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3
- https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763
- https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18
- https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5
- https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae
- https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html