CVE-2026-46300

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-46300
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

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/2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c Patch
https://git.kernel.org/stable/c/3599e6b3cc1ada96883d496a50a210d3afbb6987 Patch
https://git.kernel.org/stable/c/3884358a9286b17f389a72b1426fc4547c23c111 Patch
https://git.kernel.org/stable/c/3bd9e113d50034db99d7ef69fd8e5242d15e414a Patch
https://git.kernel.org/stable/c/760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e Patch
https://git.kernel.org/stable/c/78bf6b6bb19541d19fbda6242e7cfe2c682763c0 Patch
https://git.kernel.org/stable/c/9d3e5fd19fe1063bf607219e8562fbd567b8e8d5 Patch
https://git.kernel.org/stable/c/f84eca5817390257cef78013d0112481c503b4a3 Patch
http://www.openwall.com/lists/oss-security/2026/05/13/5 Mailing List
http://www.openwall.com/lists/oss-security/2026/05/21/11 Mailing List
http://www.openwall.com/lists/oss-security/2026/05/21/12 Mailing List
http://www.openwall.com/lists/oss-security/2026/05/21/13 Mailing List
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:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
History

26 May 2026, 15:46

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c - () https://git.kernel.org/stable/c/2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c - Patch
References () https://git.kernel.org/stable/c/3599e6b3cc1ada96883d496a50a210d3afbb6987 - () https://git.kernel.org/stable/c/3599e6b3cc1ada96883d496a50a210d3afbb6987 - Patch
References () https://git.kernel.org/stable/c/3884358a9286b17f389a72b1426fc4547c23c111 - () https://git.kernel.org/stable/c/3884358a9286b17f389a72b1426fc4547c23c111 - Patch
References () https://git.kernel.org/stable/c/3bd9e113d50034db99d7ef69fd8e5242d15e414a - () https://git.kernel.org/stable/c/3bd9e113d50034db99d7ef69fd8e5242d15e414a - Patch
References () https://git.kernel.org/stable/c/760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e - () https://git.kernel.org/stable/c/760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e - Patch
References () https://git.kernel.org/stable/c/78bf6b6bb19541d19fbda6242e7cfe2c682763c0 - () https://git.kernel.org/stable/c/78bf6b6bb19541d19fbda6242e7cfe2c682763c0 - Patch
References () https://git.kernel.org/stable/c/9d3e5fd19fe1063bf607219e8562fbd567b8e8d5 - () https://git.kernel.org/stable/c/9d3e5fd19fe1063bf607219e8562fbd567b8e8d5 - Patch
References () https://git.kernel.org/stable/c/f84eca5817390257cef78013d0112481c503b4a3 - () https://git.kernel.org/stable/c/f84eca5817390257cef78013d0112481c503b4a3 - Patch
References () http://www.openwall.com/lists/oss-security/2026/05/13/5 - () http://www.openwall.com/lists/oss-security/2026/05/13/5 - Mailing List
References () http://www.openwall.com/lists/oss-security/2026/05/21/11 - () http://www.openwall.com/lists/oss-security/2026/05/21/11 - Mailing List
References () http://www.openwall.com/lists/oss-security/2026/05/21/12 - () http://www.openwall.com/lists/oss-security/2026/05/21/12 - Mailing List
References () http://www.openwall.com/lists/oss-security/2026/05/21/13 - () http://www.openwall.com/lists/oss-security/2026/05/21/13 - Mailing List
CPE cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
CWE CWE-787
First Time Linux
Linux linux Kernel

26 May 2026, 08:02

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/f84eca5817390257cef78013d0112481c503b4a3 -

23 May 2026, 14:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-23 12:17

Updated : 2026-05-30 11:17

NVD link : CVE-2026-46300

Mitre link : CVE-2026-46300

CVE.ORG link : CVE-2026-46300

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write