5.5

CVE-2026-52916: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-52916DEBIAN-CVE-2026-52916
Published 24-06-2026Last modified 24-06-2026
Open JSON

Vulnerability summary

CVE-2026-52916 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% 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
0.12%
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 47 · Related 47
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.

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a BATADV_UNICAST_FRAG packet is received. Once all fragments are collected and the packet is reassembled, batadv_recv_frag_packet() calls batadv_batman_skb_recv() again to process the defragmented payload. A malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled payload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting). Each nesting level recurses through batadv_batman_skb_recv() without bound, growing the kernel stack until it is exhausted. Since refragmentation or fragments in fragments are not actually allowed, discard all packets which are still BATADV_UNICAST_FRAG packets after the defragmentation process.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.12%

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

No weakness data has been published for this record.

Affected systems

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < 0c208fa3859e3a33a1c38bebc41d021166e94ac8 | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < bcda4814dc6524283c0b958882cb963d75fe411d | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < aea54d0bbe156d5ab7d00d68f66149ff41f4612a | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < b54e459cf86943583c1aa2ee3081874e7ab1f5f3 | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < 5418be6c2e117bf8a316582795a8e3ff90f45e5d | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < 5895ad21c7059a652da83fb817510f7a1e962abf | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < 7138c35c9ad39a2fca6264af6b87466471f04ffc | ≥ 610bfc6bc99bc83680d190ebc69359a05fc7f605, < bc62216dc8e221e3781afa14430f45208bfa9af9 | 3.13
  • linux_kernel≥ 3.13, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 170 products

References

48 links
Show all 48 references