CVE Explorer

CVE-2026-64543

In the Linux kernel, the following vulnerability has been resolved: tipc: fix use-after-free of the discoverer in tipc_disc_rcv() bearer_disable() frees b->disc with tipc_disc_delete()'s plain kfree(), but tipc_disc_rcv() still dereferences b->disc in RX softirq under rcu_read_lock() (tipc_udp_recv -> tipc_rcv -> tipc_disc_rcv). L2 bearers are safe thanks to the synchronize_net() in tipc_disable_l2_media(), but the UDP bearer defers that call to the cleanup_bearer() workqueue, so the discover

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a31581603bdd816e796a0c7cff57b8279770945a25447ba3dfaac9ea50d2c44c

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["net/tipc/core.c","net/tipc/discover.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.17"},{"lessThan":"4.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semv…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/tipc/core.c","net/tipc/discover.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5e215bf1c47fdddf8203a0fe80a0ed594065f101","status":"affected","version":"25b0b9c4e835ffaa65b61c3efe2e28acf84d0259","versionType":"git"},{"lessThan":"ec7d54d8cc1723921d671e3272b427c96366506f","status":"affected","version":"25b0b9c4e835ffaa65b61c3efe2e28acf84d0259","versionType":"git"},{"lessThan":"a0c5fdeb5fa257f8c6d469af266bc087cb5de6a2","status":"affected","version":"25b0b9c4…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/affected/0

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/affected/1

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/affected/0

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:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/metrics/0/cvssV3_1

Source references

5 source assertions

{"url":"https://git.kernel.org/stable/c/1579342d71133da7f00daa02c75cebec7372097b"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/5e215bf1c47fdddf8203a0fe80a0ed594065f101"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/a0c5fdeb5fa257f8c6d469af266bc087cb5de6a2"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/b65289e1c3f352a9f92c6e19713ddd647e033253"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/ec7d54d8cc1723921d671e3272b427c96366506f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b2cc3a4a2d1ab30f67f24b4c00c1ac1bc81af41d94e80ee18415ceda5323b2ab · sha256:25e46c3465225105… · /containers/cna/references/1

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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