CVE-2026-90393
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
bpf: Fix potential UAF in bpf_netns_link_update_prog
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix potential UAF in bpf_netns_link_update_prog In bpf_netns_link_update_prog, the checks for old_prog and prog type are currently performed locklessly before acquiring netns_bpf_mutex. This creates a race condition that can lead to a UAF issue. If two threads concurrently execute BPF_LINK_UPDATE on the same netns link, the following execution path can trigger a UAF: CPU0 CPU1 bpf_netns_link_update_prog if (old_prog && old_prog != link->prog) return -EPERM; bpf_netns_link_update_prog if (old_prog && old_prog != link->prog) ... old_prog = xchg(&link->prog, new_prog); bpf_prog_put(old_prog); if (new_prog->type != link->prog->type) <-- trigger UAF Fix this by moving the old_prog and prog->type checks inside the netns_bpf_mutex critical section. Meanwhile, use guard() to simplify lock management and avoid all the goto jumping.
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) |
|---|---|---|---|---|---|
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | d462b5481d77ce7df8a5ff89a699386f00c9214d | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | bdddf3e1493ee973619c154a57071ce67f78598b | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | 79a66fd997d4eecf17302d613194879eb32e0986 | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | f4ce6803df4095777191d800bebc50219b615ca0 | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | 277168cb9d153ce8e9c3f9275670e32ae61b41d6 | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | bda86e9f31b9a296b6e64a51c91dc776fc9f613e | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | 923f559e95b89b33c7e1793b3d8f7f4ec9b2e4b7 | Unavailable | None listed |
| 7f045a49fee04b5662cbdeaf0838f9322ae8c63a | affected | git | 5c5997836381010fc5907b36bc17d3b19407e933 | 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) |
|---|---|---|---|---|---|
| 5.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.8 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.52 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.6 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |