5.5

CVE-2026-23362: linux Improper Locking

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-23362DEBIAN-CVE-2026-23362
Published 25-03-2026Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2026-23362 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.10% chance of exploitation in the next 30 days, higher than 0.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.10%
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 31 · Related 29
MGASA-2026-0097MGASA-2026-0098SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1

Timeline

  1. 25-03-2026
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: can: bcm: fix locking for bcm_op runtime updates Commit c2aba69d0c36 ("can: bcm: add locking for bcm_op runtime updates") added a locking for some variables that can be modified at runtime when updating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup(). Usually the RX_SETUP only handles and filters incoming traffic with one exception: When the RX_RTR_FRAME flag is set a predefined CAN frame is sent when a specific RTR frame is received. Therefore the rx bcm_op uses bcm_can_tx() which uses the bcm_tx_lock that was only initialized in bcm_tx_setup(). Add the missing spin_lock_init() when allocating the bcm_op in bcm_rx_setup() to handle the RTR case properly.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.10%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

0.00 pp

From 0.10% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.10%

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

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7595de7bc56e0e52b74e56c90f7e247bf626d628, < 0904037e713f787d1376e1d349c3bdf6c3105881 | ≥ fbd8fdc2b218e979cfe422b139b8f74c12419d1f, < c85b96eaf766d8f066b1139a17a51efa2f6627ef | ≥ 2a437b86ac5a9893c902f30ef66815bf13587bf6, < 800f26f11ae37b17f58e0001f28a47dd75c26557 | ≥ 76c84c3728178b2d38d5604e399dfe8b0752645e, < 70e951afad4c025261fe3c952d2b07237e320a01 | ≥ cc55dd28c20a6611e30596019b3b2f636819a4c0, < 8bcf2d847adb82b2c617456f6da17ac5e6c75285 | ≥ c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7, < 8215ba7bc99e84e66fd6938874ec4330a9d96518 | ≥ c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7, < f0c349b2c21b220af5ba19f29b885e222958d796 | ≥ c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7, < c35636e91e392e1540949bbc67932167cb48bc3a | 8f1c022541bf5a923c8d6fa483112c15250f30a4 | c4e8a172501e677ebd8ea9d9161d97dc4df56fbd | ≥ 5.10.238, < 5.10.253 | ≥ 5.15.185, < 5.15.203 | ≥ 6.1.141, < 6.1.167 | ≥ 6.6.93, < 6.6.130 | ≥ 6.12.31, < 6.12.77 | ≥ 5.4.294, < 5.5 | ≥ 6.14.9, < 6.15 | 6.15
  • linux_kernelEOL≥ 5.4.294, < 5.5 | ≥ 5.10.238, < 5.10.253 | ≥ 5.15.185, < 5.15.203 | ≥ 6.1.141, < 6.1.167 | ≥ 6.6.93, < 6.6.130 | ≥ 6.12.31, < 6.12.77 | ≥ 6.14.9, < 6.15 | ≥ 6.15.1, < 6.18.17 | ≥ 6.19, < 6.19.7 | 6.15 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.8-1

3 vendors · 148 products

References

39 links
Show all 39 references