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CVE-2026-45840

In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsg_new(NLMSG_DEFAULT_SIZE, ...) but serialize the full upcall PID array via ovs_vport_get_upcall_portids(). Since ovs_vport_set_upcall_portids() accepts any non-zero multiple of sizeof(u32) with no upper bound, a CAP_NET_ADMIN user can install a PID array large enough to overflow the reply buffer
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fba6c325464a929eeb371b626c4c58598d741b804f9131b1aebca465b5af3c6f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["net/openvswitch/datapath.c","net/openvswitch/vport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.17"},{"lessThan":"3.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","v…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/openvswitch/datapath.c","net/openvswitch/vport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8d59b80e69dddb665eb2de36e62859ab2073470e","status":"affected","version":"5cd667b0a4567048bb555927d6ee564f4e5620a9","versionType":"git"},{"lessThan":"d9e47e29aacb9f8a9d59feb6ab5b128a9bbb40b0","status":"affected","version":"5cd667b0a4567048bb555927d6ee564f4e5620a9","versionType":"git"},{"lessThan":"b39f763d720d623218bc1d95ace6855d7b474e81","status":"affected","ver…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["net/openvswitch/datapath.c","net/openvswitch/vport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.17"},{"lessThan":"3.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","v…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/openvswitch/datapath.c","net/openvswitch/vport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8d59b80e69dddb665eb2de36e62859ab2073470e","status":"affected","version":"5cd667b0a4567048bb555927d6ee564f4e5620a9","versionType":"git"},{"lessThan":"d9e47e29aacb9f8a9d59feb6ab5b128a9bbb40b0","status":"affected","version":"5cd667b0a4567048bb555927d6ee564f4e5620a9","versionType":"git"},{"lessThan":"b39f763d720d623218bc1d95ace6855d7b474e81","status":"affected","ver…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/affected/0

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/1d6c02b86329883aa467a3a61f8d34369db73a2f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/2091c6aa0df6aba47deb5c8ab232b1cb60af3519"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/8d59b80e69dddb665eb2de36e62859ab2073470e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/b39f763d720d623218bc1d95ace6855d7b474e81"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/d9e47e29aacb9f8a9d59feb6ab5b128a9bbb40b0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/f99ac36b5d7c719d08a69fcdecce40f78a874e15"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/f9ef3db77a383d66847fd082c2b437d8ae4d9c63"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/fa6e90bc443bed8dc0d55bc5ea5b27ffdfe37704"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:27a96f3deaf3ad1ec683ecfc691c85e01d4fdf7f97b5a5008cc084e990b826ea · sha256:75bbc427fcfcfb92… · /containers/cna/references/5

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.

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