CVE-2026-90157
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: Reject negative optlen in cgroup getsockopt hook
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject negative optlen in cgroup getsockopt hook A cgroup getsockopt BPF program can shrink ctx->optlen after the kernel getsockopt handler has run. The kernel-buffer variant, used by TCP_ZEROCOPY_RECEIVE, only rejects values larger than the original length. If BPF writes a negative optlen, that value is accepted and propagated back to the TCP getsockopt code. It can then be passed to copy_to_sockptr() as a size_t and trigger the hardened usercopy bytes > INT_MAX warning. Reject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(), matching the lower-bound validation already present in the sockptr-based getsockopt hook.
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) |
|---|---|---|---|---|---|
| 08f61a34913558e06576e7b6318bf583f273c1be | affected | git | 5b09d984b38b018b123c3a9e02a96bbc6468dbe5 | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | 554ba7195c4108726450e24480c8449990c2268c | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | d02a12b4085ffe41ea750b1007f7a9c7aee2875a | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2 | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | f68671b1a98d426c57864bd457c125fee14ac1a5 | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | 2bdbe00454200fcb0110f31eeca8d906a3515e74 | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | 31a89af4f513d750fec196e2bb6195a7d4473e9f | Unavailable | None listed |
| 9cacf81f8161111db25f98e78a7a0e32ae142b3f | affected | git | 1b5aacd5b2419b0790e955e466d389a61c79b4b1 | Unavailable | None listed |
| 5.10.188 | affected | semver | 5.10.270 | 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) |
|---|---|---|---|---|---|
| 5.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.12 | 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 |