CVE-2026-63954

Description

In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.

References

• https://git.kernel.org/stable/c/010b08084000ef018f1a8de5197087f3b91d8cfe
• https://git.kernel.org/stable/c/0886c6f257fe3663f80218aa1919b0f3f21bf22c
• https://git.kernel.org/stable/c/1648a3c7f4e18f46a4881920133fc4f2494185a0
• https://git.kernel.org/stable/c/1d73a533760bc5abb83b3cc759133596f7bb708f
• https://git.kernel.org/stable/c/4f37bb30b57d6d403d02673074555bd3c3602bef
• https://git.kernel.org/stable/c/7c58c55a2a16f7274772507bd1637be609351b4f
• https://git.kernel.org/stable/c/974820a59efde7c1a7e1260bcfe9bb81f833cc9f
• https://git.kernel.org/stable/c/d98d8562b3284b5a5c8eb67e71b794508e46e288