CVE-2026-53074: Linux kernel · bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e6aa481f21fc7a41ed344767ea25aae9d03fae71 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:49 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in e6aa481f21fc7a41ed344767ea25aae9d03fae71, 8042240412de3222d27b31e89d29336961cad9e4, 7254267799d083280c0e53effc101a33add95f7b +5
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
In the Linux kernel, the following vulnerability has been resolved: bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb bpf_prog_test_run_skb() calls eth_type_trans() first and then uses skb->protocol to initialize sk family and address fields for the test run. For IPv4 and IPv6 packets, it may access ip_hdr(skb) or ipv6_hdr(skb) even when the provided test input only contains an Ethernet header. Reject the input earlier if the Ethernet frame carries IPv4/IPv6 EtherType but the L3 header is too short. Fold the IPv4/IPv6 header length checks into the existing protocol switch and return -EINVAL before accessing the network headers.
References
- git.kernel.org/stable/c/7254267799d083280c0e53effc101a33add95f7b (opens in a new tab)
- git.kernel.org/stable/c/6a9f38d5ff11e00bc54baab752642978805e81eb (opens in a new tab)
- git.kernel.org/stable/c/e6aa481f21fc7a41ed344767ea25aae9d03fae71 (opens in a new tab)
- git.kernel.org/stable/c/0a04db240effd85773f66244645a28cedddb72d2 (opens in a new tab)
- git.kernel.org/stable/c/1f882c492d46f90bdb36f4936876c88c28dab21c (opens in a new tab)
- git.kernel.org/stable/c/8042240412de3222d27b31e89d29336961cad9e4 (opens in a new tab)
- git.kernel.org/stable/c/6def5fe753cbe5b279ee5fd10327b2611cbddaca (opens in a new tab)
- git.kernel.org/stable/c/12bec2bd4b76d81c5d3996bd14ec1b7f4d983747 (opens in a new tab)