CVE-2024-26591

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-26591
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpf_tracing_prog_attach The following case can cause a crash due to missing attach_btf: 1) load rawtp program 2) load fentry program with rawtp as target_fd 3) create tracing link for fentry program with target_fd = 0 4) repeat 3 In the end we have: - prog->aux->dst_trampoline == NULL - tgt_prog == NULL (because we did not provide target_fd to link_create) - prog->aux->attach_btf == NULL (the program was loaded with attach_prog_fd=X) - the program was loaded for tgt_prog but we have no way to find out which one BUG: kernel NULL pointer dereference, address: 0000000000000058 Call Trace: <TASK> ? __die+0x20/0x70 ? page_fault_oops+0x15b/0x430 ? fixup_exception+0x22/0x330 ? exc_page_fault+0x6f/0x170 ? asm_exc_page_fault+0x22/0x30 ? bpf_tracing_prog_attach+0x279/0x560 ? btf_obj_id+0x5/0x10 bpf_tracing_prog_attach+0x439/0x560 __sys_bpf+0x1cf4/0x2de0 __x64_sys_bpf+0x1c/0x30 do_syscall_64+0x41/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 Return -EINVAL in this situation.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b Patch
https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0 Patch
https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee Patch
https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c Patch
https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

18 Mar 2024, 17:54

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b - () https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b - Patch
References () https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0 - () https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0 - Patch
References () https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee - () https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee - Patch
References () https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c - () https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c - Patch
References () https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653 - () https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653 - Patch
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: Se corrigió la rama de re-adjunción en bpf_tracing_prog_attach El siguiente caso puede causar un bloqueo debido a la falta de adjunto_btf: 1) cargar el programa rawtp 2) cargar el programa fentry con rawtp como target_fd 3) crear enlace de seguimiento para el programa fentry con target_fd = 0 4) repetir 3 Al final tenemos: - prog-&gt;aux-&gt;dst_trampoline == NULL - tgt_prog == NULL (porque no proporcionamos target_fd para link_create) - prog-&gt;aux -&gt;attach_btf == NULL (el programa se cargó con adjunto_prog_fd=X) - el programa se cargó para tgt_prog pero no tenemos forma de averiguar cuál ERROR: desreferencia del puntero NULL del núcleo, dirección: 0000000000000058 Seguimiento de llamadas: ? __morir+0x20/0x70 ? page_fault_oops+0x15b/0x430? fixup_exception+0x22/0x330? exc_page_fault+0x6f/0x170? asm_exc_page_fault+0x22/0x30? bpf_tracing_prog_attach+0x279/0x560? btf_obj_id+0x5/0x10 bpf_tracing_prog_attach+0x439/0x560 __sys_bpf+0x1cf4/0x2de0 __x64_sys_bpf+0x1c/0x30 do_syscall_64+0x41/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/ 0x76 Devuelve -EINVAL en esta situación.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
CWE CWE-476

22 Feb 2024, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-22 17:15

Updated : 2024-03-18 17:54

NVD link : CVE-2024-26591

Mitre link : CVE-2024-26591

CVE.ORG link : CVE-2024-26591

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference