CVE-2026-98872None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: freevxfs: don't BUG() on unknown typed-extent type vxfs_bmap_typed() handles four typed-extent types and calls BUG() in its default case, so an on-disk typed extent wi…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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In the Linux kernel, the following vulnerability has been resolved:
freevxfs: don't BUG() on unknown typed-extent type
vxfs_bmap_typed() handles four typed-extent types and calls BUG() in its default case, so an on-disk typed extent with any other type value crashes the kernel. It is reachable from ioctl(FIBMAP) on a regular file:
kernel BUG at fs/freevxfs/vxfs_bmap.c:230! RIP: vxfs_bmap_typed fs/freevxfs/vxfs_bmap.c:230 [inline] vxfs_bmap1+0x128a/0x12d0 fs/freevxfs/vxfs_bmap.c:257
Replace the BUG() with WARN_ON_ONCE() and return 0 -- the value vxfs_bmap_typed() already returns on failure (and from the DEV4 case above); vxfs_getblk() maps 0 to -EIO, so the ioctl fails cleanly.
Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fe40a19d571cbb584eea46038ee919d8712b2d2cLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 500e9d5bf9eff2096a21b7ac25a0a06ca46ab821Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f1f2d54a576f0e4133b979e545abcfefd439c300Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7ada9807e37103b41f586d34e3075e1209182b65Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1284d687d46953fff9c0d969df108114611aca8bLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 405f13d7b270913e06e8e2b4de568985f94ef7d6Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 704d48d81dc41470e108811c32c577ada66192d4Linux < 5.10.271Linux < 5.15.222Linux < 6.1.189Linux < 6.6.158Linux < 6.12.111Linux < 6.18.53Linux (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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