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CVE-2026-64295

In the Linux kernel, the following vulnerability has been resolved: mm: page_ext: add count limit to page_ext_iter_next to prevent invalid PFN access The page_ext iteration API does not validate if the PFN still belongs to a valid section while advancing the iterator. When dynamically adding memory in the hotplug path, it can lead to a NULL pointer dereference during page_ext_lookup at the boundary of the last valid section when iterator count equals __pgcount. The for_each_page_ext() macro
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c25dfea6a768537dc1a74e5682fd8e2a8c71ac8393dd4d72d96ae3bd7ed28ffd
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":["include/linux/page_ext.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc3","versionType":"original_commit_for_fix"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/page_ext.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8dcaa0f87a88d720d13106f3a306c6b61d189d86","status":"affected","version":"9039b9096ea27a20f0349d1537537663c935c8ed","versionType":"git"},{"lessThan":"377b1cd6bbcf327338cd951cc2fd74bc75540235","status":"affected","version":"9039b9096ea27a20f0349d1537537663c935c8ed","versionType":"git"},{"lessThan":"ffd017237cfe99e6e5602ab14179b0e6878a0840","status":"affected","version":"9039b9096ea27a20f0349…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/page_ext.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc3","versionType":"original_commit_for_fix"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/page_ext.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8dcaa0f87a88d720d13106f3a306c6b61d189d86","status":"affected","version":"9039b9096ea27a20f0349d1537537663c935c8ed","versionType":"git"},{"lessThan":"377b1cd6bbcf327338cd951cc2fd74bc75540235","status":"affected","version":"9039b9096ea27a20f0349d1537537663c935c8ed","versionType":"git"},{"lessThan":"ffd017237cfe99e6e5602ab14179b0e6878a0840","status":"affected","version":"9039b9096ea27a20f0349…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/affected/0

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/377b1cd6bbcf327338cd951cc2fd74bc75540235"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/8dcaa0f87a88d720d13106f3a306c6b61d189d86"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/ffd017237cfe99e6e5602ab14179b0e6878a0840"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9dcbfeda86debc912bcc7815b4285744463f08737a6580d792355d02d19ba39b · sha256:730c8e79a5baea7e… · /containers/cna/references/2

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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