CVE-2023-53136
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-53136
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53136.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2023-53136
- Downstream
- Published
- 2025-05-02T15:56:08.940Z
- Modified
- 2025-11-30T03:47:34.576243Z
- Summary
- af_unix: fix struct pid leaks in OOB support
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
af_unix: fix struct pid leaks in OOB support
syzbot reported struct pid leak [1].
Issue is that queueoob() calls maybeadd_creds() which potentially holds a reference on a pid.
But skb->destructor is not set (either directly or by calling unixscmto_skb())
This means that subsequent kfreeskb() or consumeskb() would leak this reference.
In this fix, I chose to fully support scm even for the OOB message.
[1] BUG: memory leak unreferenced object 0xffff8881053e7f80 (size 128): comm "syz-executor242", pid 5066, jiffies 4294946079 (age 13.220s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff812ae26a>] allocpid+0x6a/0x560 kernel/pid.c:180 [<ffffffff812718df>] copyprocess+0x169f/0x26c0 kernel/fork.c:2285 [<ffffffff81272b37>] kernelclone+0xf7/0x610 kernel/fork.c:2684 [<ffffffff812730cc>] _dosysclone+0x7c/0xb0 kernel/fork.c:2825 [<ffffffff849ad699>] dosyscallx64 arch/x86/entry/common.c:50 [inline] [<ffffffff849ad699>] dosyscall64+0x39/0xb0 arch/x86/entry/common.c:80 [<ffffffff84a0008b>] entrySYSCALL64afterhwframe+0x63/0xcd
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53136.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/2aab4b96900272885bc157f8b236abf1cdc02e08
- https://git.kernel.org/stable/c/a59d6306263c38e5c0592ea4451ca26a0778c947
- https://git.kernel.org/stable/c/ac1968ac399205fda9ee3b18f7de7416cb3a5d0d
- https://git.kernel.org/stable/c/f3969427fb06a2c3cd6efd7faab63505cfa76e76
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53136.json
- https://nvd.nist.gov/vuln/detail/CVE-2023-53136
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced314001f0bf927015e459c9d387d62a231fe93af3Fixedf3969427fb06a2c3cd6efd7faab63505cfa76e76Fixedac1968ac399205fda9ee3b18f7de7416cb3a5d0dFixeda59d6306263c38e5c0592ea4451ca26a0778c947Fixed2aab4b96900272885bc157f8b236abf1cdc02e08