CVE-2026-43494

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43494
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().

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113 Patch
https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353 Patch
https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479 Patch
https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51 Patch
https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799 Patch
https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa Patch
https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6 Patch
https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4 Patch
https://github.com/v12-security/pocs/tree/main/pintheft Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/21/2 Mailing List
https://access.redhat.com/security/cve/CVE-2026-43494
https://bugzilla.redhat.com/show_bug.cgi?id=2480434
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
History

23 Jul 2026, 16:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: net/rds: restablecer op_nents cuando falla el anclaje de página de copia cero Cuando iov_iter_get_pages2() falla en rds_message_zcopy_from_user(), las páginas ancladas se liberan con put_page(), y rm->data.op_mmp_znotifier se borra. Pero no logramos borrar correctamente rm->data.op_nents. Más tarde, cuando se llama a rds_message_purge() desde rds_sendmsg(), el bucle de limpieza itera sobre el número incorrectamente no cero de op_nents y los libera de nuevo. Solucionar esto restableciendo correctamente op_nents cuando debería ser en rds_message_zcopy_from_user().

30 Jun 2026, 03:19

Type Values Removed Values Added
References
  • () https://access.redhat.com/security/cve/CVE-2026-43494 -
  • () https://bugzilla.redhat.com/show_bug.cgi?id=2480434 -
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json -
CWE CWE-1341

26 Jun 2026, 17:30

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113 - () https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113 - Patch
References () https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353 - () https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353 - Patch
References () https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479 - () https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479 - Patch
References () https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51 - () https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51 - Patch
References () https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799 - () https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799 - Patch
References () https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa - () https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa - Patch
References () https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6 - () https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6 - Patch
References () https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4 - () https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4 - Patch
References () https://github.com/v12-security/pocs/tree/main/pintheft - () https://github.com/v12-security/pocs/tree/main/pintheft - Exploit, Third Party Advisory
References () http://www.openwall.com/lists/oss-security/2026/05/21/2 - () http://www.openwall.com/lists/oss-security/2026/05/21/2 - Mailing List

12 Jun 2026, 10:16

Type Values Removed Values Added
References
  • () https://github.com/v12-security/pocs/tree/main/pintheft -

01 Jun 2026, 17:17

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113 -
  • () https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa -
  • () https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6 -

30 May 2026, 11:17

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

23 May 2026, 12:17

Type Values Removed Values Added
References
  • () 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 -

21 May 2026, 16:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/21/2 -

21 May 2026, 12:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-21 12:16

Updated : 2026-07-23 16:10

NVD link : CVE-2026-43494

Mitre link : CVE-2026-43494

CVE.ORG link : CVE-2026-43494

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo CWE-1341

Multiple Releases of Same Resource or Handle