- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 6 months later
· 6 months 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 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)
- 0.12% · top 98% of all CVEs (11 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: Medium 5.5.
Affected products
- affected b453361384c2db1c703dacb806d5fd36aec4ceca – < 10bc4a4dcded509c5d5c67d497900c3922c604cd
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < 21a10c06ffae24cb01fd174a7ab7736001d2ea56
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < 8755066f7bd0f4ac46a29d1708c7b20894539252
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < 70abd9d118da2f56beb4ec22e3a29becae373535
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < 63276547debc4d8a73eefb2c5273b2a905c961b0
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < 4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09
- affected 20b2aff4bc15bda809f994761d5719827d66c0b4 – < b0db1accbc7395657c2b79db59fa9fae0d6656f3
- affected e982070f8970bb62e69ed7c9cafff886ed200349
- affected 5.15.37 – < 5.15.203
- affected 5.16.11 – < 5.17
- affected 5.17
- unaffected < 5.17
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.134 – ≤ 6.6.*
- unaffected 6.12.81 – ≤ 6.12.*
- unaffected 6.18.22 – ≤ 6.18.*
- unaffected 6.19.12 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/10bc4a4dcded509c5d5c67d497900c3922c604cd (opens in a new tab)
- https://git.kernel.org/stable/c/21a10c06ffae24cb01fd174a7ab7736001d2ea56 (opens in a new tab)
- https://git.kernel.org/stable/c/8755066f7bd0f4ac46a29d1708c7b20894539252 (opens in a new tab)
- https://git.kernel.org/stable/c/70abd9d118da2f56beb4ec22e3a29becae373535 (opens in a new tab)
- https://git.kernel.org/stable/c/63276547debc4d8a73eefb2c5273b2a905c961b0 (opens in a new tab)
- https://git.kernel.org/stable/c/4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09 (opens in a new tab)
- https://git.kernel.org/stable/c/b0db1accbc7395657c2b79db59fa9fae0d6656f3 (opens in a new tab)
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)
- EUVD EUVD-2026-28617 (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://cveledger.app/cve/CVE-2026-43333)Record last updated .