CVE-2024-26591: bpf: Fix re-attachment branch in bpf_tracing_prog_attach
First published: Thu Feb 22 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.15.148 | |
| Linux Linux kernel | >=5.16.0<6.1.75 | |
| Linux Linux kernel | >=6.2.0<6.6.14 | |
| Linux Linux kernel | >=6.7.0<6.7.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.6-1 6.12.9-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b
- https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0
- https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee
- https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c
- https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653
- https://launchpad.net/bugs/cve/CVE-2024-26591
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26591
- https://nvd.nist.gov/vuln/detail/CVE-2024-26591
- https://security-tracker.debian.org/tracker/CVE-2024-26591
- https://ubuntu.com/security/CVE-2024-26591
- https://git.kernel.org/linus/715d82ba636cb3629a6e18a33bb9dbe53f9936ee
- https://access.redhat.com/security/cve/CVE-2024-26591
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2265648
- agent/weakness
- agent/title
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/epss-latest
- source/FIRST
- agent/epss
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-26591
- agent/references
- agent/severity
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/tags
- agent/event
- collector/nvd-cve
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.16.0
- version/linux linux kernel/6.2.0
- version/linux linux kernel/6.7.0
- package-manager/debian