CVE Explorer

CVE-2026-31700

In the Linux kernel, the following vulnerability has been resolved: net/packet: fix TOCTOU race on mmap'd vnet_hdr in tpacket_snd() In tpacket_snd(), when PACKET_VNET_HDR is enabled, vnet_hdr points directly into the mmap'd TX ring buffer shared with userspace. The kernel validates the header via __packet_snd_vnet_parse() but then re-reads all fields later in virtio_net_hdr_to_skb(). A concurrent userspace thread can modify the vnet_hdr fields between validation and use, bypassing all safety c

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:85b77570169df6e30318a1d56a7e53fbf95c6472de4ac3c690e480a05c7949bf

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/packet/af_packet.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0f4c9754956b86de158a4af5278c5cf5bda9439e","status":"affected","version":"1d036d25e5609ba73fee6a88db01c306b140d512","versionType":"git"},{"lessThan":"714aa973da8163925eda7efd49361ccbee21ee46","status":"affected","version":"1d036d25e5609ba73fee6a88db01c306b140d512","versionType":"git"},{"lessThan":"1490f82353bdabc09265a74e645b07f05cf4188e","status":"affected","version":"1d036d25e5609ba73fee6a8…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/packet/af_packet.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.6"},{"lessThan":"4.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThan…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions

{"url":"https://git.kernel.org/stable/c/0f4c9754956b86de158a4af5278c5cf5bda9439e"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/1490f82353bdabc09265a74e645b07f05cf4188e"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/28324a3b62d9ce7f9bdd65a8ce63f382041d1b27"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/2c054e17d9d41f1020376806c7f750834ced4dc5"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/7

{"url":"https://git.kernel.org/stable/c/3a1bf9116ea31470b89692585c3910dfe830dcdd"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/48a6ef291a17639e1b6ae0fbe9c8b2bb87d7804b"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/6

{"url":"https://git.kernel.org/stable/c/714aa973da8163925eda7efd49361ccbee21ee46"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/74e2db36fe50e3ad9d5300d7fd0e6e2a15a6d121"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:55b89c8db3353ac84745b951df856d95d75e0b40e3b2068c29898b46f5690553 · sha256:5de37bd162e1747d… · /containers/cna/references/3

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer