7.1

CVE-2026-31626: linux Use of Uninitialized Resource

CVSS: 7.1v3.1HighModified
AliasesUBUNTU-CVE-2026-31626DEBIAN-CVE-2026-31626CGA-5w7f-8gmj-3h75
Published 24-04-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-31626 is a high (CVSS 7.1) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.1% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 45 · Related 46
OPENSUSE-SU-2026:10703-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() Initialize le_tmp64 to zero in rtw_BIP_verify() to prevent using uninitialized data. Smatch warns that only 6 bytes are copied to this 8-byte (u64) variable, leaving the last two bytes uninitialized: drivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify() warn: not copying enough bytes for '&le_tmp64' (8 vs 6 bytes) Initializing the variable at the start of the function fixes this warning and ensures predictable behavior.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

+0.15 pp

From 0.29% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.44%

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

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard10 products
  • linux-aws-6.12< 6.12.85-r0
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.12< 6.12.85-r0
  • linux-gcp-6.18< 6.18.31-r0
Linux2 products
  • linux≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 6792624d933146e2757b07092e93ad915cb58930 | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 51532c7c1d357145f4ac561648499f7a6847f739 | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 9e911eead187240193516edf55a0e1ab3425aa5b | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < c65ee4d3be5df395e48afbcd0946dd5fce4338a9 | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < d5b8f5f8d6fc09a8af5ed139c688660f578ed732 | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < b487a7754d874230299d5a9c2710ec4df8b2ed8a | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < c2026c6b603ebec52f55015496703fe79077accf | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < ef74ce5f0bc0e53ce702d8a794f3957884a26efc | ≥ 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 8c964b82a4e97ec7f25e17b803ee196009b38a57 | 4.12
  • linux_kernel≥ 4.12, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 170 products

References

48 links
Show all 48 references