CVE-2024-39472: xfs: fix log recovery buffer allocation for the legacy h_size fixup
First published: Fri Jul 05 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: xfs: fix log recovery buffer allocation for the legacy h_size fixup Commit a70f9fe52daa ("xfs: detect and handle invalid iclog size set by mkfs") added a fixup for incorrect h_size values used for the initial umount record in old xfsprogs versions. Later commit 0c771b99d6c9 ("xfs: clean up calculation of LR header blocks") cleaned up the log reover buffer calculation, but stoped using the fixed up h_size value to size the log recovery buffer, which can lead to an out of bounds access when the incorrect h_size does not come from the old mkfs tool, but a fuzzer. Fix this by open coding xlog_logrec_hblks and taking the fixed h_size into account for this calculation.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=6.9.3 | |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a
- https://git.kernel.org/stable/c/57835c0e7152e36b03875dd6c56dfeed685c1b1f
- https://git.kernel.org/stable/c/c2389c074973aa94e34992e7f66dac0de37595b5
- https://git.kernel.org/stable/c/f754591b17d0ee91c2b45fe9509d0cdc420527cb
- https://access.redhat.com/security/cve/CVE-2024-39472
- https://lore.kernel.org/linux-cve-announce/2024070512-CVE-2024-39472-f977@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2295910
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:8158
- https://access.redhat.com/errata/RHSA-2024:8157
- https://access.redhat.com/errata/RHSA-2024:8617
- https://bugzilla.redhat.com/show_bug.cgi?id=2296067
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39472
- https://nvd.nist.gov/vuln/detail/CVE-2024-39472
- https://launchpad.net/bugs/cve/CVE-2024-39472
- https://security-tracker.debian.org/tracker/CVE-2024-39472
- https://ubuntu.com/security/CVE-2024-39472
- https://git.kernel.org/linus/45cf976008ddef4a9c9a30310c9b4fb2a9a6602a
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