CVE-2023-52676
bpf: Guard stack limits against 32bit overflow
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard stack limits against 32bit overflow This patch promotes the arithmetic around checking stack bounds to be done in the 64-bit domain, instead of the current 32bit. The arithmetic implies adding together a 64-bit register with a int offset. The register was checked to be below 1<<29 when it was variable, but not when it was fixed. The offset either comes from an instruction (in which case it is 16 bit), from another register (in which case the caller checked it to be below 1<<29 [1]), or from the size of an argument to a kfunc (in which case it can be a u32 [2]). Between the register being inconsistently checked to be below 1<<29, and the offset being up to an u32, it appears that we were open to overflowing the `int`s which were currently used for arithmetic. [1] https://github.com/torvalds/linux/blob/815fb87b753055df2d9e50f6cd80eb10235fe3e9/kernel/bpf/verifier.c#L7494-L7498 [2] https://github.com/torvalds/linux/blob/815fb87b753055df2d9e50f6cd80eb10235fe3e9/kernel/bpf/verifier.c#L11904
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 2 years later
· 2 years 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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)
- 0.24% · top 85% of all CVEs (7 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: High 7.8.
Weakness
Affected products
- affected f3c4b01689d392373301e6e60d1b02c5b4020afc – < ad1754f86a87fe74912fb542b23ff24ada4e3307
- affected 01f810ace9ed37255f27608a0864abebccf0aab3 – < 4ba97610399e83d29d1086a0827d33172539b49b
- affected 01f810ace9ed37255f27608a0864abebccf0aab3 – < e160b2ed94a20fa940369ebd914277f88005e70d
- affected 01f810ace9ed37255f27608a0864abebccf0aab3 – < ad140fc856f0b1d5e2215bcb6d0cc247a86805a2
- affected 01f810ace9ed37255f27608a0864abebccf0aab3 – < e5ad9ecb84405637df82732ee02ad741a5f782a6
- affected 01f810ace9ed37255f27608a0864abebccf0aab3 – < 1d38a9ee81570c4bd61f557832dead4d6f816760
- affected d1b725ea5d104caea250427899f4e2e3ab15b4fc
- affected 5.10.33 – < 5.10.270
- affected 5.11.17 – < 5.12
- affected 5.12
- unaffected < 5.12
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.14 – ≤ 6.6.*
- unaffected 6.7.2 – ≤ 6.7.*
- unaffected 6.8 – ≤ *
References (6)
- https://git.kernel.org/stable/c/ad1754f86a87fe74912fb542b23ff24ada4e3307 (opens in a new tab)
- https://git.kernel.org/stable/c/4ba97610399e83d29d1086a0827d33172539b49b (opens in a new tab)
- https://git.kernel.org/stable/c/e160b2ed94a20fa940369ebd914277f88005e70d (opens in a new tab)
- https://git.kernel.org/stable/c/ad140fc856f0b1d5e2215bcb6d0cc247a86805a2 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e5ad9ecb84405637df82732ee02ad741a5f782a6 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1d38a9ee81570c4bd61f557832dead4d6f816760 (opens in a new tab)x_transferred
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)
- 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://trackcve.app/cve/CVE-2023-52676)Record last updated .