CVE-2025-40078
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
bpf: Explicitly check accesses to bpf_sock_addr
In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | de44cdc50d2dce8718cb57deddf9cf1be9a7759f | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | 76e04bbb4296fb6eac084dbfc27e02ccc744db3e | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | 6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | 4f00858cd9bbbdf67159e28b85a8ca9e77c83622 | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | cdeafacb4f9ff261a96baef519e29480fd7b1019 | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | fe9d33f0470350558cb08cecb54cf2267b3a45d2 | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69 | Unavailable | None listed |
| 1cedee13d25ab118d325f95588c1a084e9317229 | affected | git | 6fabca2fc94d33cdf7ec102058983b086293395f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.18 | Unavailable | None listed |
| 5.4.301 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.246 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.195 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.156 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.112 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.53 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.17.3 | unaffected | semver | Unavailable | 6.17.* | None listed |
| 6.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |