9.8

CVE-2026-53355: linux NULL Pointer Dereference

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-53355DEBIAN-CVE-2026-53355
Published 01-07-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-53355 is a critical (CVSS 9.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 41 · Related 40
MGASA-2026-0312OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 01-07-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: rds: clear i_sends on setup unwind The RDS IB connection teardown path is written so it can run during partial startup and on repeated shutdown attempts. It uses NULL pointers to distinguish resources that are still owned from resources that have already been released. When rds_ib_setup_qp() fails after allocating i_sends but before allocating i_recvs, the sends_out path frees i_sends without clearing the pointer. A later shutdown pass can still treat that stale pointer as a live send ring allocation. Clear i_sends after vfree() in the error unwind path so the existing shutdown logic continues to use the correct ownership state.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

0.00 pp

From 0.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 5.15.0-194.204 | < 6.8.0-142.142 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1116.123 | < 6.8.0-1065.68 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 66cccec111421a10efdc2c74499d15b93e7acae5 | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 2c5e5e4a5970c41f16e3ad801a78719ed5d5c71b | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 29d940026dce39e3018dab6f67c9427249321270 | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < e7cf30aa5f1fc6c2a86df65df8b731df20e44d79 | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < f16ad421a4e3e7db2d14bdf3b16f583bc4f3b30a | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 1d4ec754ee3871f7e3670c67bb0298c9c5760926 | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 27040bbca289a704eafcacca167d310c6ce2b1bc | ≥ 3b12f73a5c2977153f28a224392fd4729b50d1dc, < 20cf0fb715c41111469577e85e35d15f099473e0 | 75a12b2fa80c2e4cc40a9f9305f95899850b7426 | c9459693fae9a1bf3f51f3db98617f694112e897 | 13099ee9c7d54b0a25f6c8397675aed99e9cfa45 | 5c6712ab4efb6cf60e16719ab6bcaface9cc268c | ≥ 3.18.74, < 3.19 | ≥ 4.1.46, < 4.2 | ≥ 4.4.91, < 4.5 | ≥ 4.9.54, < 4.10 | 4.11
  • linux_kernel≥ 3.18.74, < 3.19 | ≥ 4.1.46, < 4.2 | ≥ 4.4.91, < 4.5 | ≥ 4.9.54, < 4.10 | ≥ 4.11.1, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 4.11 | 4.11:rc3 | 4.11:rc4 | 4.11:rc5 | 4.11:rc6 | 4.11:rc7 | 4.11:rc8 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1

3 vendors · 171 products

References

40 links
Show all 40 references