Description
In the Linux kernel, the following vulnerability has been resolved: FS: JFS: Fix null-ptr-deref Read in txBegin Syzkaller reported an issue where txBegin may be called on a superblock in a read-only mounted filesystem which leads to NULL pointer deref. This could be solved by checking if the filesystem is read-only before calling txBegin, and returning with appropiate error code.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/1b4c144767736221cad92c132f72b3c6ed06a0ea Patch
- git.kernel.org/stable/c/2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1 Patch
- git.kernel.org/stable/c/3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3 Patch
- git.kernel.org/stable/c/3e94d0d378d2754b26fc54b429582553f7b53e15 Patch
- git.kernel.org/stable/c/47cfdc338d674d38f4b2f22b7612cc6a2763ba27 Patch
- git.kernel.org/stable/c/a7225e9e09519deb7e0c42eb6070029cc456e84d Patch
- git.kernel.org/stable/c/a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2 Patch
- git.kernel.org/stable/c/fd2db13fb72ff18c633a48229589d42ceb89d1f8 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 9 November 2026
- CWE
- CWE-476
Could this be exploited in your environment?
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