CVE-2026-43494 The advisory has been revoked - it doesn't affect any version of package kernel-devel (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS6-KERNELDEVEL-16799196
- published22 May 2026
- disclosed21 May 2026
Introduced: 21 May 2026
CVE-2026-43494 (opens in a new tab)Amendment
The Centos security team deemed this advisory irrelevant for Centos:6.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by Centos.
In the Linux kernel, the following vulnerability has been resolved:
net/rds: reset op_nents when zerocopy page pin fails
When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents.
Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again.
Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().
References
- https://access.redhat.com/security/cve/CVE-2026-43494
- https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113
- https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353
- https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479
- https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51
- https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799
- https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa
- https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6
- https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4
- https://github.com/v12-security/pocs/tree/main/pintheft
- http://www.openwall.com/lists/oss-security/2026/05/21/2
- https://bugzilla.redhat.com/show_bug.cgi?id=2480434
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json
- https://github.com/jayhutajulu1/CVE-2026-43494-PinTheft-PoC