Use-after-free in Linux kernel - CVE-2026-80848
Published: September 5, 2026
Vulnerability identifier: #VU147071
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80848
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in the espintcp_close routine when closing espintcp sockets while queued reinjection work is running. A local user can race socket closure against queued reinjection work to trigger a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-80848
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/24efebecf415ba264adba0f0491cec436463a14f
- https://git.kernel.org/stable/c/29121c5e6591da527e8e36ddac7120dc527f574d
- https://git.kernel.org/stable/c/4b31a875693c480c611519faca46216514e3e052
- https://git.kernel.org/stable/c/4bc0dfa28dca6fc0084203732695968049c44072
- https://git.kernel.org/stable/c/54b41ad14da9a981131ab6e4d3f79321a503ea5d
- https://git.kernel.org/stable/c/deb232e884877bf10b4ce2580909eedec986c284
- https://git.kernel.org/stable/c/eb3bbf29c723fe75c0eb92be14f0ec92971fe272
- https://git.kernel.org/stable/c/ed5d9102190c45fc70121c036b0626b740040b75
- https://git.kernel.org/stable/c/ff8dd7a932f34409a56e1b91a1219340f17457e9