Ubuntu.comUB:CVE-2024-26848CVE-2024-26848
In the Linux kernel, the following vulnerability has been resolved: afs:
Fix endless loop in directory parsing If a directory has a block with only
“.__afsXXXX” files in it (from uncompleted silly-rename), these .__afsXXXX
files are skipped but without advancing the file position in the
dir_context. This leads to afs_dir_iterate() repeating the block again and
again. Fix this by making the code that skips the .__afsXXXX file also
manually advance the file position. The symptoms are a soft lookup:
watchdog: BUG: soft lockup - CPU#3 stuck for 52s! [check:5737] … RIP:
0010:afs_dir_iterate_block+0x39/0x1fd … ? watchdog_timer_fn+0x1a6/0x213
… ? asm_sysvec_apic_timer_interrupt+0x16/0x20 ?
afs_dir_iterate_block+0x39/0x1fd afs_dir_iterate+0x10a/0x148
afs_readdir+0x30/0x4a iterate_dir+0x93/0xd3 __do_sys_getdents64+0x6b/0xd4
This is almost certainly the actual fix for:
https://bugzilla.kernel.org/show_bug.cgi?id=218496
Notes
| Author | Note |
|---|---|
| rodrigo-zaiden | break and fix commit were reverted in 0aec3847d044273733285dcff90afda89ad461d2. So, that is another way of seeing this being fixed. |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < 5.4.0-186.206 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | linux | < 6.8.0-35.35 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1126.136 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
References
git.kernel.org/linus/5f7a07646655fb4108da527565dcdc80124b14c4 (6.8-rc7)
git.kernel.org/stable/c/058ed71e0f7aa3b6694ca357e23d084e5d3f2470
git.kernel.org/stable/c/106e14ca55a0acb3236ee98813a1d243f8aa2d05
git.kernel.org/stable/c/2afdd0cb02329464d77f3ec59468395c791a51a4
git.kernel.org/stable/c/5c78be006ed9cb735ac2abf4fd64f3f4ea26da31
git.kernel.org/stable/c/5f7a07646655fb4108da527565dcdc80124b14c4
git.kernel.org/stable/c/76426abf9b980b46983f97de8e5b25047b4c9863
git.kernel.org/stable/c/80b15346492bdba677bbb0adefc611910e505f7b
git.kernel.org/stable/c/854ebf45a4ddd4cadeffb6644e88d19020634e1a
git.kernel.org/stable/c/96370ba395c572ef496fd2c7afc4a1ab3dedd3f0
git.kernel.org/stable/c/9c41f4935625218a2053a2dce1423c3054169809
git.kernel.org/stable/c/a6ffae61ad9ebf2fdcb943135b2f30c85f49cd27
git.kernel.org/stable/c/b94f434fe977689da4291dc21717790b9bd1c064
git.kernel.org/stable/c/f67898867b6b0f4542cddc7fe57997978b948a7a
git.kernel.org/stable/c/fe02316e4933befc621fa125efb8f8b4d04cceec
launchpad.net/bugs/cve/CVE-2024-26848
nvd.nist.gov/vuln/detail/CVE-2024-26848
security-tracker.debian.org/tracker/CVE-2024-26848
ubuntu.com/security/notices/USN-6816-1
ubuntu.com/security/notices/USN-6817-1
ubuntu.com/security/notices/USN-6817-2
ubuntu.com/security/notices/USN-6817-3
ubuntu.com/security/notices/USN-6831-1
www.cve.org/CVERecord?id=CVE-2024-26848
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