erofs: preserve LZMA decoders on resize failure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97605
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:14 UTC
Updated2026-09-25 11:17:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: erofs: preserve LZMA decoders on resize failure The pool-resize path frees each stream's old decoder before allocating its replacement. If an allocation fails after some streams have already been replaced, the failed stream is put back on the list with state == NULL. z_erofs_lzma_max_dictsize is still advanced as if the whole pool had been resized. An existing LZMA mount can select the broken stream and pass NULL to xz_dec_microlzma_reset(). A retry at the same size also skip another resize attempt. Since the global maximum was advanced, thus, the invalid state is left unrepaired. Allocate each replacement before freeing the old decoder, temporarily retaining one old decoder during allocation. Stop at the first failure and advance z_erofs_lzma_max_dictsize only after all streams satisfy the request. Record each stream's dictionary capacity so retries can skip streams already enlarged before a partial failure.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.088180000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 622ceaddb7649ca328832f50ba1400af778d75fa 604ce546e1b9f35b1f45588004f53fac6b2869c1 git Not specified
CNA Linux Linux affected 622ceaddb7649ca328832f50ba1400af778d75fa 0b3c8c39e50249470f00a5f73c288b95a55ab576 git Not specified
CNA Linux Linux affected 622ceaddb7649ca328832f50ba1400af778d75fa 38e9e07ac02a9453a117410776f1502a9980997e git Not specified
CNA Linux Linux affected 622ceaddb7649ca328832f50ba1400af778d75fa 617d0d8d199ba1790c94310fd75a22d01c97a8d6 git Not specified
CNA Linux Linux affected 5.16 Not specified
CNA Linux Linux unaffected 5.16 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/38e9e07ac02a9453a117410776f1502a9980997e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/617d0d8d199ba1790c94310fd75a22d01c97a8d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/604ce546e1b9f35b1f45588004f53fac6b2869c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b3c8c39e50249470f00a5f73c288b95a55ab576 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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