CVE-2024-50163bpf: Make sure internal and UAPI bpf_redirect flags don't overlap
- 5.5MediumCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 17 days later
· 17 days later
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 – < 4e1e428533845d48828bd3875c0e92e8565b9962
- affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 – < 314dbee9fe4f5cee36435465de52c988d7caa466
- affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 – < 0fca5ed4be8e8bfbfb9bd97845af596bab7192d3
- affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 – < cec288e05ceac9a0d3a3a1fd279534b11844c826
- affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 – < 09d88791c7cd888d5195c84733caf9183dcfbd16
- affected 5.14
- unaffected < 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.*
- unaffected 6.12 – ≤ *
References
References6
- https://git.kernel.org/stable/c/4e1e428533845d48828bd3875c0e92e8565b9962 (opens in a new tab)
- https://git.kernel.org/stable/c/314dbee9fe4f5cee36435465de52c988d7caa466 (opens in a new tab)
- https://git.kernel.org/stable/c/0fca5ed4be8e8bfbfb9bd97845af596bab7192d3 (opens in a new tab)
- https://git.kernel.org/stable/c/cec288e05ceac9a0d3a3a1fd279534b11844c826 (opens in a new tab)
- https://git.kernel.org/stable/c/09d88791c7cd888d5195c84733caf9183dcfbd16 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-44665 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-50163)Record last updated .