CVE - CVE-2025-21683

CVE-ID
CVE-2025-21683	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_sk_select_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 SO_ATTACH_REUSEPORT_EBPF set before it was ESTABLISHED. In other words, a non-NULL sk_reuseport_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 __reuseport_alloc+0x1d/0x40 reuseport_alloc+0xca/0x150 reuseport_attach_prog+0x87/0x140 sk_reuseport_attach_bpf+0xc8/0x100 sk_setsockopt+0x1181/0x1990 do_sock_setsockopt+0x12b/0x160 __sys_setsockopt+0x7b/0xc0 __x64_sys_setsockopt+0x1b/0x30 do_syscall_64+0x93/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf URL:https://git.kernel.org/stable/c/0ab52a8ca6e156a64c51b5e7456cac9a0ebfd9bf MISC:https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e URL:https://git.kernel.org/stable/c/b02e70be498b138e9c21701c2f33f4018ca7cd5e MISC:https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf URL:https://git.kernel.org/stable/c/b3af60928ab9129befa65e6df0310d27300942bf MISC:https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc URL:https://git.kernel.org/stable/c/bb36838dac7bb334a3f3d7eb29875593ec9473fc MISC:https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3 URL:https://git.kernel.org/stable/c/cccd51dd22574216e64e5d205489e634f86999f3 MISC:https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd URL:https://git.kernel.org/stable/c/d0a3b3d1176d39218b8edb2a2d03164942ab9ccd
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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