5.5

CVE-2022-48770: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()

Analyzed
AliasesUBUNTU-CVE-2022-48770DEBIAN-CVE-2022-48770
Published 20-06-2024Last modified 11-05-2026

Vulnerability summary

CVE-2022-48770 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
SUSE-SU-2024:2372-1SUSE-SU-2024:2394-1SUSE-SU-2024:2939-1

Timeline

  1. 20-06-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0, < ff6bdc205fd0a83bd365405d4e31fb5905826996 | ≥ fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0, < 0bcd484587b3b3092e448d27dc369e347e1810c3 | ≥ fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0, < b82ef4985a6d05e80f604624332430351df7b79a | ≥ fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0, < b992f01e66150fc5e90be4a96f5eb8e634c8249e | 5.9
  • linux_kernel≥ 5.9, < 5.10.96 | ≥ 5.11, < 5.15.19 | ≥ 5.16, < 5.16.5 | 5.17:rc1
Debian1 product
  • linux< 5.16.7-1

3 vendors · 65 products

References

8 links