bpf: Make sure internal and UAPI bpf_redirect flags don't overlap (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Make sure internal and UAPI bpf_redirect flags don't overlap The bpf_redirect_info is shared between the SKB and XDP redirect paths, and the two paths use the same numeric flag values in the ri->flags field (specifically, BPF_F_BROADCAST == BPF_F_NEXTHOP). This means that if skb bpf_redirect_neigh() is used with a non-NULL params argument and, subsequently, an XDP redirect is performed using the same bpf_redirect_info struct, the XDP path will get confused and end up crashing, which syzbot managed to trigger. With the stack-allocated bpf_redirect_info, the structure is no longer shared between the SKB and XDP paths, so the crash doesn't happen anymore. However, different code paths using identically-numbered flag values in the same struct field still seems like a bit of a mess, so this patch cleans that up by moving the flag definitions together and redefining the three flags in BPF_F_REDIRECT_INTERNAL to not overlap with the flags used for XDP. It also adds a BUILD_BUG_ON() check to make sure the overlap is not re-introduced by mistake.
References
- https://git.kernel.org/stable/c/4e1e428533845d48828bd3875c0e92e8565b9962
- https://git.kernel.org/stable/c/314dbee9fe4f5cee36435465de52c988d7caa466
- https://git.kernel.org/stable/c/0fca5ed4be8e8bfbfb9bd97845af596bab7192d3
- https://git.kernel.org/stable/c/cec288e05ceac9a0d3a3a1fd279534b11844c826
- https://git.kernel.org/stable/c/09d88791c7cd888d5195c84733caf9183dcfbd16
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2024-44665
- GCVE · GCVE-0-2024-50163
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0529 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0509 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0482 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0465 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0449 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0366 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0349 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0276 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0185 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0168 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0152 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.14 < 5.15.170cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.115cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.59cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.11.6cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 4e1e428533845d48828bd3875c0e92e8565b9962 ; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 314dbee9fe4f5cee36435465de52c988d7caa466 ; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 0fca5ed4be8e8bfbfb9bd97845af596bab7192d3 ; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < cec288e05ceac9a0d3a3a1fd279534b11844c826 ; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 < 09d88791c7cd888d5195c84733caf9183dcfbd16 |
| Linux · Linux | affected 5.14 ; unaffected 0 < 5.14 ; unaffected 5.15.170 ≤ 5.15.* ; unaffected 6.1.115 ≤ 6.1.* ; unaffected 6.6.59 ≤ 6.6.* ; unaffected 6.11.6 ≤ 6.11.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |