CVE-2025-21683
- Source
- https://cve.org/CVERecord?id=CVE-2025-21683
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21683.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21683
- Downstream
- Related
- Published
- 2025-01-31T11:25:42.903Z
- Modified
- 2026-05-07T04:18:20.926585Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- bpf: Fix bpf_sk_select_reuseport() memory leak
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix bpfskselect_reuseport() memory leak
As pointed out in the original comment, lookup in sockmap can return a TCP ESTABLISHED socket. Such TCP socket may have had SOATTACHREUSEPORTEBPF set before it was ESTABLISHED. In other words, a non-NULL skreuseport_cb does not imply a non-refcounted socket.
Drop sk's reference in both error paths.
unreferenced object 0xffff888101911800 (size 2048): comm "test_progs", pid 44109, jiffies 4297131437 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 80 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 9336483b): __kmalloc_noprof+0x3bf/0x560 __reuseportalloc+0x1d/0x40 reuseportalloc+0xca/0x150 reuseportattachprog+0x87/0x140 skreuseportattachbpf+0xc8/0x100 sksetsockopt+0x1181/0x1990 dosocksetsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64syssetsockopt+0x1b/0x30 dosyscall64+0x93/0x180 entrySYSCALL64afterhwframe+0x76/0x7e
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21683.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf
- https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e
- https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf
- https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc
- https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3
- https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21683.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-21683
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introduced64d85290d79c0677edb5a8ee2295b36c022fa5dfFixedbb36838dac7bb334a3f3d7eb29875593ec9473fcFixed0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bfFixedd0a3b3d1176d39218b8edb2a2d03164942ab9ccdFixedb02e70be498b138e9c21701c2f33f4018ca7cd5eFixedcccd51dd22574216e64e5d205489e634f86999f3Fixedb3af60928ab9129befa65e6df0310d27300942bf