CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a netaddr4 from a GETDEVICEINFO multipath-DS body, then immediately calls strrchr(buf, '.') to locate the port separator. Both decodes use xdr_stream_decode_string_dup(), and the current code checks only "nlen < 0" / "rlen < 0" before dereferencing the returned string. When the on-wire opaque has length zero, xdr_stream_decode_opaque_inline() returns 0 and xdr_stream_decode_string_dup() falls through to its "*str = NULL; return ret" tail, leaving buf NULL with a return value of 0. The "< 0" check does not catch this, and the next line is strrchr(NULL, '.'), a kernel NULL pointer dereference reachable from any pNFS-flexfile client mounted against a malicious or compromised metadata server. Reject the zero-length cases explicitly so the decoder fails with -EBADMSG (treated as a malformed GETDEVICEINFO body) instead of panicking the client.
Засегнати продукти
- Linux Linux: 6b7f3cf96364eaf597940cb5c68a682894829915 преди 76b94cbd32aacf36a641956385a852635c6802b9; 6b7f3cf96364eaf597940cb5c68a682894829915 преди c8e4e0c701d0192a2efb6df059c0f9e19678c23d; 6b7f3cf96364eaf597940cb5c68a682894829915 преди 6c344fff2feff9d4d716d8e4ad40e9b5040ee5ea; 6b7f3cf96364eaf597940cb5c68a682894829915 преди 427ab81a811dab4bca9d19f82eec5847ae42646e; 6b7f3cf96364eaf597940cb5c68a682894829915 преди 012d37a568bfbb2c9686f03ade75560bc7139956; 6b7f3cf96364eaf597940cb5c68a682894829915 преди 30aae62e50b4e074a90a9a5e15246548fbdc1182; 6b7f3cf96364eaf597940cb5c68a682894829915 преди 41fe0f7b84f0cb822ae10ab08592996a592b2a25
- Linux Linux: 4.0; преди 4.0; 5.15.211 до 5.15.*; 6.1.177 до 6.1.*; 6.6.144 до 6.6.*; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 19 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-53391
- https://nvd.nist.gov/vuln/detail/CVE-2026-53391
- https://git.kernel.org/stable/c/76b94cbd32aacf36a641956385a852635c6802b9
- https://git.kernel.org/stable/c/c8e4e0c701d0192a2efb6df059c0f9e19678c23d
- https://git.kernel.org/stable/c/6c344fff2feff9d4d716d8e4ad40e9b5040ee5ea
- https://git.kernel.org/stable/c/427ab81a811dab4bca9d19f82eec5847ae42646e
- https://git.kernel.org/stable/c/012d37a568bfbb2c9686f03ade75560bc7139956
- https://git.kernel.org/stable/c/30aae62e50b4e074a90a9a5e15246548fbdc1182
- https://git.kernel.org/stable/c/41fe0f7b84f0cb822ae10ab08592996a592b2a25