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CVE-2026-64523

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Take a long-lived file reference at submit handshake_nl_accept_doit() needs the file pointer backing req->hr_sk->sk_socket to survive the window between handshake_req_next() and the subsequent FD_PREPARE() and get_file(). The submit-side sock_hold() does not provide that. sk_refcnt keeps struct sock alive, but struct socket is owned by sock->file: when the consumer fputs the last file reference, sock_release()
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3bf734522d87c5698a5818a06df710e4ea3ded8e1c05379684370d4aa37c480c
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":"unaffected","product":"Linux","programFiles":["net/handshake/handshake.h","net/handshake/netlink.c","net/handshake/request.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"685b10dd0e32c7782cead16c8cf055c609678583","status":"affected","version":"3b3009ea8abb713b022d94fba95ec270cf6e7eae","versionType":"git"},{"lessThan":"16eaba5aa89c04eea125905bb8f988c1897f4f29","status":"affected","version":"3b3009ea8abb713b022d94fba95ec270cf6e7eae","versionType":"git"},{"lessThan":"09dba37eee70d0596e26645015f1aa95a9848e9d"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/handshake/handshake.h","net/handshake/netlink.c","net/handshake/request.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","versio…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/handshake/handshake.h","net/handshake/netlink.c","net/handshake/request.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"685b10dd0e32c7782cead16c8cf055c609678583","status":"affected","version":"3b3009ea8abb713b022d94fba95ec270cf6e7eae","versionType":"git"},{"lessThan":"16eaba5aa89c04eea125905bb8f988c1897f4f29","status":"affected","version":"3b3009ea8abb713b022d94fba95ec270cf6e7eae","versionType":"git"},{"lessThan":"09dba37eee70d0596e26645015f1aa95a9848e9d"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/handshake/handshake.h","net/handshake/netlink.c","net/handshake/request.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","versio…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/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:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/metrics/0/cvssV3_1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/09dba37eee70d0596e26645015f1aa95a9848e9d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/16eaba5aa89c04eea125905bb8f988c1897f4f29"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/685b10dd0e32c7782cead16c8cf055c609678583"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0b8adceca6b207ef4132e6548a31a7a323c16e352db522e8268b8e332192749d · sha256:3b453cf348e32322… · /containers/cna/references/0

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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