ecryptfs: pass packet set buffer size to parser

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Summary

CVECVE-2026-89608
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:45 UTC
Updated2026-09-11 20:19:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ecryptfs: pass packet set buffer size to parser ecryptfs_parse_packet_set() receives a pointer into the file header, but it calculates the remaining packet buffer size from PAGE_SIZE - 8. For version 1 headers the packet set starts later in the header, so this can overstate the available buffer. Pass the actual packet set buffer length from the caller and calculate per-packet limits from the remaining bytes in that buffer. Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 237fead619984cc48818fe12ee0ceada3f55b012 329de8b9e988b152b938f09224670d97bada0b96 git Not specified
CNA Linux Linux affected 237fead619984cc48818fe12ee0ceada3f55b012 e5d254e654f2311a3c4b9c791d7f216554bcd17a git Not specified
CNA Linux Linux affected 237fead619984cc48818fe12ee0ceada3f55b012 747fd45be396a6aea3420ab657a0ab4e60185b05 git Not specified
CNA Linux Linux affected 237fead619984cc48818fe12ee0ceada3f55b012 2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2 git Not specified
CNA Linux Linux affected 2.6.19 Not specified
CNA Linux Linux unaffected 2.6.19 semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/329de8b9e988b152b938f09224670d97bada0b96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/747fd45be396a6aea3420ab657a0ab4e60185b05 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e5d254e654f2311a3c4b9c791d7f216554bcd17a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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