CVE-2026-52934: linux
Vulnerability summary
CVE-2026-52934 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 30 · Related 30Timeline
- 24-06-2026PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tvlv: reject oversized TVLV packets batadv_tvlv_container_ogm_append() builds a TVLV packet section from the tvlv.container_list. The total size of this section is computed by batadv_tvlv_container_list_size(), which sums the sizes of all registered containers. The return type and accumulator in batadv_tvlv_container_list_size() were u16. If the accumulated size exceeds U16_MAX, the value wraps around, causing the subsequent allocation in batadv_tvlv_container_ogm_append() to be undersized. The memcpy-style copy that follows would then write beyond the end of the allocated buffer, corrupting kernel memory. Fix this by widening the return type of batadv_tvlv_container_list_size() to size_t. In batadv_tvlv_container_ogm_append(), check the computed length against U16_MAX before proceeding, and bail out as if the allocation had failed when the limit is exceeded.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
0.00 pp
From 0.24% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu167 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < c02aa6c0c9d1bea9bb75dea362b75ad225137bae | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < 1595628a2f877d052eda18865ccf539392c47c04 | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < 6448a49344e87487b61bd88cb850cd694a0f576d | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < 13493b00dd1e05a705981e052158652ea23eb482 | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < 94db72e9dac202e017ee3db22c59d17e4f3bf171 | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < ede47988ac5687793745b17c1634a496a2299919 | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < 94a3d72cd9b21116d7c6d5bdc57c11401fc28557 | ≥ ef26157747d42254453f6b3ac2bd8bd3c53339c3, < f50487e3566358b2b982b7801945e858c78ad9ab | 3.13
- linux_kernel≥ 3.13, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.93 | ≥ 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
