---
cve: "CVE-2024-26591"
severity: "LOW"
cvss: 3.1
epss: "23%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-02-22 17:15:09"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T07:48:07+02:00"
---

# CVE-2024-26591

> 3.1 LOW

## Beschreibung

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:
     
     ? __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.

## Patch verfügbar (OSV)

- Kernel ≥ 5.15.148
- Kernel ≥ 6.1.75
- Kernel ≥ 6.6.14
- Kernel ≥ 6.7.2

## Referenzen

- <https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653>
- <https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0>
- <https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c>
- <https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b>
- <https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-26591) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_