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CVE-2022-48770
bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()
Medium5.5EPSS 0.22%
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.
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)
- 0.22% · top 88% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 – < ff6bdc205fd0a83bd365405d4e31fb5905826996
- affected fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 – < 0bcd484587b3b3092e448d27dc369e347e1810c3
- affected fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 – < b82ef4985a6d05e80f604624332430351df7b79a
- affected fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 – < b992f01e66150fc5e90be4a96f5eb8e634c8249e
- affected 5.9
- unaffected < 5.9
- unaffected 5.10.96 – ≤ 5.10.*
- unaffected 5.15.19 – ≤ 5.15.*
- unaffected 5.16.5 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (4)
- https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249e (opens in a new tab)x_transferred
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)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-48770)Record last updated .