CVE catalog
CVE-2022-50668
linux: CVE-2022-50668
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.81% · Oct 25, 2026
In the Linux kernel, the following vulnerability has been resolved: ext4: fix deadlock due to mbcache entry corruption When manipulating xattr blocks, we can deadlock infinitely looping inside ext4_xattr_block_set() where we constantly keep finding xattr block for reuse in mbcache but we are unable to reuse it because its reference count is too big. This happens because cache entry for the xattr block is marked as reusable (e_reusable set) although its reference count is too big. When this inconsistency happens, this inconsistent state is kept indefinitely and so ext4_xattr_block_set() keeps retrying indefinitely. The inconsistent state is caused by non-atomic update of e_reusable bit. e_reusable is part of a bitfield and e_reusable update can race with update of e_referenced bit in the same bitfield resulting in loss of one of the updates. Fix the problem by using atomic bitops instead. This bug has been around for many years, but it became *much* easier to hit after commit 65f8b80053a1 ("ext4: fix race when reusing xattr blocks").
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | linux | sid | 7.2.12-1 | fixed |
| Debian | linux | forky | 7.2.12-1 | fixed |
| Debian | linux | trixie | 6.12.107-1 | fixed |
| Debian | linux | trixie-security | 6.12.113-1 | fixed |
| Debian | linux | bookworm | 6.1.176-1 | fixed |
| Debian | linux | bookworm-security | 6.1.190-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | linux | source | sid | 6.1.4-1 | not yet assigned | Not reported | Not reported |
| Debian | linux | source | forky | 6.1.4-1 | not yet assigned | Not reported | Not reported |
| Debian | linux | source | trixie | 6.1.4-1 | not yet assigned | Not reported | Not reported |
| Debian | linux | source | bookworm | 6.1.4-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [bpftool]Unknown
Source package: [linux]
Details (6)
7.1.0+6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
7.1.0+6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
7.5.0+6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
7.5.0+6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
7.1.0+6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
7.1.0+6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [hyperv-daemons]Unknown
Source package: [linux]
Details (6)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [intel-sdsi]Unknown
Source package: [linux]
Details (1)
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [libcpupower1]Unknown
Source package: [linux]
Details (6)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [libcpupower-dev]Unknown
Source package: [linux]
Details (6)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-bpf-dev]Unknown
Source package: [linux]
Details (2)
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-compiler-gcc-12-x86]Unknown
Source package: [linux]
Details (2)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-config-6.1]Unknown
Source package: [linux]
Details (4)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-cpupower]Unknown
Source package: [linux]
Details (6)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· amd64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· arm64 · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-doc]Unknown
Source package: [linux]
Details (32)
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.43-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.43-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.57-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.57-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.63-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.63-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.69-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.69-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.73-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.73-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.74-2~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.74-2~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.85-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.85-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.86-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.86-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.88-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.88-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.90-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.90-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.90-2~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.90-2~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.94-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.94-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.12.95-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· all · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· all · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-doc-6.1]Unknown
Source package: [linux]
Details (6)
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.176-1· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· all · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.180-1· all · bookworm-securityFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-amd64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-arm64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-cloud-amd64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-cloud-arm64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-common]Unknown
Source package: [linux]
Details (2)
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-common-rt]Unknown
Source package: [linux]
Details (2)
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
6.1.170-3· all · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-rt-amd64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-47-rt-arm64]Unknown
Source package: [linux]
Details (1)
6.1.170-3· arm64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
- [linux-headers-6.1.0-50-amd64]Unknown
Source package: [linux]
Details (1)
6.1.176-1· amd64 · bookwormFixed · Fixed:
6.1.4-1dsa · linux · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2023_2458.json]
- [https://security-tracker.debian.org/tracker/CVE-2022-50668]
- [https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50668.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2765.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]