Name | CVE-2022-4696 |
Description | There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
References | DLA-3349-1, DSA-5324-1, ELA-810-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | vulnerable |
stretch (security) | 4.9.320-2 | vulnerable | |
stretch (lts), stretch | 4.9.320-3 | vulnerable | |
buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
bullseye | 5.10.223-1 | fixed | |
bullseye (security) | 5.10.226-1 | fixed | |
bookworm | 6.1.115-1 | fixed | |
bookworm (security) | 6.1.112-1 | fixed | |
trixie | 6.11.5-1 | fixed | |
sid | 6.11.7-1 | fixed | |
linux-5.10 (PTS) | stretch (lts), stretch | 5.10.226-1~deb9u1 | fixed |
buster, buster (lts) | 5.10.226-1~deb10u1 | fixed | |
buster (security) | 5.10.218-1~deb10u1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
linux | source | jessie | (unfixed) | end-of-life | ||
linux | source | stretch | (unfixed) | end-of-life | ||
linux | source | buster | (not affected) | |||
linux | source | bullseye | 5.10.162-1 | DSA-5324-1 | ||
linux | source | (unstable) | 5.14.6-1 | |||
linux-5.10 | source | stretch | 5.10.162-1~deb9u1 | ELA-810-1 | ||
linux-5.10 | source | buster | 5.10.162-1~deb10u1 | DLA-3349-1 |
[buster] - linux <not-affected> (Vulnerable code not present)
https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a