CVE-2026-43333
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 direct access to nullable PTR_TO_BUF pointers
In the Linux kernel, the following vulnerability has been resolved: bpf: reject direct access to nullable PTR_TO_BUF pointers check_mem_access() matches PTR_TO_BUF via base_type() which strips PTR_MAYBE_NULL, allowing direct dereference without a null check. Map iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL. On stop callbacks these are NULL, causing a kernel NULL dereference. Add a type_may_be_null() guard to the PTR_TO_BUF branch, matching the existing PTR_TO_BTF_ID pattern.
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) |
|---|---|---|---|---|---|
| b453361384c2db1c703dacb806d5fd36aec4ceca | affected | git | 10bc4a4dcded509c5d5c67d497900c3922c604cd | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | 21a10c06ffae24cb01fd174a7ab7736001d2ea56 | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | 8755066f7bd0f4ac46a29d1708c7b20894539252 | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | 70abd9d118da2f56beb4ec22e3a29becae373535 | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | 63276547debc4d8a73eefb2c5273b2a905c961b0 | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | 4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09 | Unavailable | None listed |
| 20b2aff4bc15bda809f994761d5719827d66c0b4 | affected | git | b0db1accbc7395657c2b79db59fa9fae0d6656f3 | Unavailable | None listed |
| e982070f8970bb62e69ed7c9cafff886ed200349 | affected | git | Unavailable | Unavailable | None listed |
| 5.15.37 | affected | semver | 5.15.203 | Unavailable | None listed |
| 5.16.11 | affected | semver | 5.17 | 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) |
|---|---|---|---|---|---|
| 5.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.17 | Unavailable | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.168 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.134 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.81 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.22 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.12 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |