5.5

CVE-2026-52937: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-52937DEBIAN-CVE-2026-52937CGA-332q-mx3g-gg67
Published 24-06-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-52937 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.3% 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
0.11%
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 23 · Related 23
OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23221-1

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR In the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an uninitialised on-stack struct sockaddr_storage to userspace via ifr_hwaddr, but netif_get_mac_address() only writes sa_family and dev->addr_len (6 for Ethernet) bytes, leaving sa_data[6..13] uninitialised. Those 8 trailing bytes leak kernel stack contents; SIOCGIFHWADDR on a macvtap chardev returns kernel .text and direct-map pointers, defeating KASLR. Initialise ss at declaration.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

0.00 pp

From 0.11% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.11%

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

Ubuntu164 products
  • linuxAll versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard5 products
  • linux-aws-6.12All versions (No fix recorded)
  • linux-azure-6.12All versions (No fix recorded)
  • linux-gcp-6.12All versions (No fix recorded)
  • linux-qemu-6.12All versions (No fix recorded)
  • linux-vmware-6.12All versions (No fix recorded)
Linux2 products
  • linux≥ 3b23a32a63219f51a5298bc55a65ecee866e79d0, < 37d028a473b0826ad5970b52b791db4a29a23627 | ≥ 3b23a32a63219f51a5298bc55a65ecee866e79d0, < 8197905d97099d8b1e3883112bbb497abd20f9f0 | ≥ 3b23a32a63219f51a5298bc55a65ecee866e79d0, < 719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb | ≥ 3b23a32a63219f51a5298bc55a65ecee866e79d0, < 05305e832be7b9d65b2b72caacf7d850b3942b2a | ≥ 3b23a32a63219f51a5298bc55a65ecee866e79d0, < bddc09212c24934643bd44fc794748d2bbb3b6cd | 176188cff67ec1aa55103647b61d02315cc38e98 | 1fc205d9e400f069ebf30d3faa6ec2bab2cbd7b4 | 4d0ae760c02c98fc78b78d3a0509896bc648ad1c | ≥ 5.4.103, < 5.5 | ≥ 5.10.21, < 5.11 | ≥ 5.11.4, < 5.12 | 5.12
  • linux_kernel≥ 5.4.103, < 5.5 | ≥ 5.10.21, < 5.11 | ≥ 5.11.4, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linuxAll versions (No fix recorded) | < 7.0.12-1

4 vendors · 172 products

References

20 links
Show all 20 references