CVE-2026-52934
published 2026-06-24CVE-2026-52934: In the Linux kernel, the following vulnerability has been resolved: batman-adv: tvlv: reject oversized TVLV packets batadv_tvlv_container_ogm_append() builds a…
PriorityP345high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
EPSS
0.25%
15.9th percentile
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.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < c02aa6c0c9d1bea9bb75dea362b75ad225137bae | c02aa6c0c9d1bea9bb75dea362b75ad225137bae |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < 1595628a2f877d052eda18865ccf539392c47c04 | 1595628a2f877d052eda18865ccf539392c47c04 |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < 6448a49344e87487b61bd88cb850cd694a0f576d | 6448a49344e87487b61bd88cb850cd694a0f576d |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < 13493b00dd1e05a705981e052158652ea23eb482 | 13493b00dd1e05a705981e052158652ea23eb482 |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < 94db72e9dac202e017ee3db22c59d17e4f3bf171 | 94db72e9dac202e017ee3db22c59d17e4f3bf171 |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < ede47988ac5687793745b17c1634a496a2299919 | ede47988ac5687793745b17c1634a496a2299919 |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < 94a3d72cd9b21116d7c6d5bdc57c11401fc28557 | 94a3d72cd9b21116d7c6d5bdc57c11401fc28557 |
| linux | linux | >= ef26157747d42254453f6b3ac2bd8bd3c53339c3 < f50487e3566358b2b982b7801945e858c78ad9ab | f50487e3566358b2b982b7801945e858c78ad9ab |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 3.13 < 5.10.259 | 5.10.259 |
| linux | linux_kernel | >= 5.11 < 5.15.210 | 5.15.210 |
| linux | linux_kernel | >= 5.16 < 6.1.176 | 6.1.176 |
| linux | linux_kernel | >= 6.13 < 6.18.34 | 6.18.34 |
| linux | linux_kernel | >= 6.19 < 7.0.11 | 7.0.11 |
| linux | linux_kernel | >= 6.2 < 6.6.143 | 6.6.143 |
| linux | linux_kernel | >= 6.7 < 6.12.93 | 6.12.93 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
kernel: batman-adv: tvlv: reject oversized TVLV packets
vendor_redhat·2026-06-24
CVE-2026-52934 CWE-190 kernel: batman-adv: tvlv: reject oversized TVLV packets
kernel: batman-adv: tvlv: reject oversized TVLV packets
A flaw was found in the Linux kernel's batman-adv (Better Approach To Mobile Ad-hoc Networking - Advanced) module. An integer overflow vulnerability in the TVLV (Type-Length-Value) packet processing can lead to an undersized memory allocation. This allows a subsequent operation to write beyond the intended buffer, causing kernel memory corruption. This issue could potentially be exploited by an attacker to achieve a denial of service or, in some cases, arbitrary code execution.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: ke
GHSA
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.cont
ghsa_unreviewed·2026-06-24
CVE-2026-52934 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.cont
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_co
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576dhttps://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137baehttps://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab
2026-06-24
Published