7.1

CVE-2021-46908: bpf: Use correct permission flag for mixed signed bounds arithmetic

Modified
AliasesUBUNTU-CVE-2021-46908DEBIAN-CVE-2021-46908
Published 27-02-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-46908 is a high (CVSS 7.1) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
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 2 · Related 2
SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1

Timeline

  1. 27-02-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Use correct permission flag for mixed signed bounds arithmetic We forbid adding unknown scalars with mixed signed bounds due to the spectre v1 masking mitigation. Hence this also needs bypass_spec_v1 flag instead of allow_ptr_leaks.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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

No weakness data has been published for this record.

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≥ 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366, < 4f3ff11204eac0ee23acf64deecb3bad7b0db0c6 | ≥ 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366, < 4ccdc6c6cae38b91c871293fb0ed8c6845a61b51 | ≥ 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366, < 9601148392520e2e134936e76788fc2a6371e7be | 5.8
  • linux_kernel≥ 5.8.0, < 5.10.32 | ≥ 5.11.0, < 5.11.16
Debian1 product
  • linux< 5.10.38-1

3 vendors · 65 products

References

7 links