5.5

CVE-2026-23140: bpf, test_run: Subtract size of xdp_frame from allowed metadata size

Analyzed
AliasesUBUNTU-CVE-2026-23140DEBIAN-CVE-2026-23140
Published 14-02-2026Last modified 11-05-2026

Vulnerability summary

CVE-2026-23140 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.6% 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
0.14%
0%100%
Low · +0.01 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 24 · Related 22
MGASA-2026-0097MGASA-2026-0098OPENSUSE-SU-2026:20572-1SUSE-SU-2026:1573-1SUSE-SU-2026:21114-1SUSE-SU-2026:21123-1

Timeline

  1. 14-02-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf, test_run: Subtract size of xdp_frame from allowed metadata size The xdp_frame structure takes up part of the XDP frame headroom, limiting the size of the metadata. However, in bpf_test_run, we don't take this into account, which makes it possible for userspace to supply a metadata size that is too large (taking up the entire headroom). If userspace supplies such a large metadata size in live packet mode, the xdp_update_frame_from_buff() call in xdp_test_run_init_page() call will fail, after which packet transmission proceeds with an uninitialised frame structure, leading to the usual Bad Stuff. The commit in the Fixes tag fixed a related bug where the second check in xdp_update_frame_from_buff() could fail, but did not add any additional constraints on the metadata size. Complete the fix by adding an additional check on the metadata size. Reorder the checks slightly to make the logic clearer and add a comment.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.13% 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.

Ubuntu130 products
  • linux< 6.8.0-117.117 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1055.58 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b6f1f780b3932ae497ed85e79bc8a1e513883624, < e7440935063949d6f2c10f7328d960d0ff4bce90 | ≥ b6f1f780b3932ae497ed85e79bc8a1e513883624, < 7c81ad5e580bd8441f8a521a8d34824ce6582ae5 | ≥ b6f1f780b3932ae497ed85e79bc8a1e513883624, < 6447e697cfa8a43a8e491cb81bcc390d0f28f8ba | ≥ b6f1f780b3932ae497ed85e79bc8a1e513883624, < 31e37f44b60679d90b9f999c91371b15291be8e0 | ≥ b6f1f780b3932ae497ed85e79bc8a1e513883624, < e558cca217790286e799a8baacd1610bda31b261 | 5.18
  • linux_kernel≥ 5.18, < 6.1.161 | ≥ 6.2, < 6.6.121 | ≥ 6.7, < 6.12.66 | ≥ 6.13, < 6.18.6 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1

3 vendors · 133 products

References

24 links
Show all 24 references