7.5

CVE-2026-53235: net: add pskb_may_pull() to skb_gro_receive_list()

Analyzed
AliasesUBUNTU-CVE-2026-53235DEBIAN-CVE-2026-53235CGA-54r5-3qqm-rg5m
Published 25-06-2026Last modified 05-08-2026

Vulnerability summary

CVE-2026-53235 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.44%
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 19 · Related 18
MGASA-2026-0312OPENSUSE-SU-2026:21555-1RHSA-2026:64775SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23221-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: add pskb_may_pull() to skb_gro_receive_list() skb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without first ensuring the data is in the linear area via pskb_may_pull(). When the skb arrives via napi_gro_frags(), skb_headlen can be 0 (all data in page fragments) while skb_gro_offset is non-zero (after IP+TCP header parsing). The skb_pull() then decrements skb->len by skb_gro_offset but skb->data_len stays unchanged, hitting BUG_ON(skb->len < skb->data_len) in __skb_pull(). The UDP fraglist GRO path already contains this guard at udp_offload.c:749. Adding it to skb_gro_receive_list() itself provides centralized protection for all callers (TCP, UDP, and any future protocols), and ensures the precondition of skb_pull() is satisfied before it is called. On pskb_may_pull() failure, set NAPI_GRO_CB(skb)->flush = 1 so the skb is not held as a new GRO head and is instead delivered through the normal receive path, matching the UDP handling.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.44% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linuxAll versions (No fix recorded) | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-azure-6.18< 6.18.38-r0
  • linux-gcp-6.18< 6.18.38-r0
  • linux-gcp-6.18-bootc-boot-installed< 6.18.38-r0
  • linux-qemu-6.18< 6.18.38-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.38-r0
Linux2 products
  • linux≥ 8d95dc474f85481652a0e422d2f1f079de81f63c, < 9e636c995b7beeb74ea882968248752821c244c4 | ≥ 8d95dc474f85481652a0e422d2f1f079de81f63c, < 0cde3a004119db637b401c54e77536e4145fc0b4 | ≥ 8d95dc474f85481652a0e422d2f1f079de81f63c, < 848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac | ≥ 8d95dc474f85481652a0e422d2f1f079de81f63c, < f2bb3434544454099a5b6dec213567267b05d79d | 6.10
  • linux_kernel≥ 6.10, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6 | 7.1:rc7
Debian1 product
  • linux< 6.12.94-1 | < 7.0.13-1

4 vendors · 128 products

References

22 links
Show all 22 references