CVE-2025-21712

md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime

HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.22 % · centile 13 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime After commit ec6bb299c7c3 ("md/md-bitmap: add 'sync_size' into struct md_bitmap_stats"), following panic is reported: Oops: general protection fault, probably for non-canonical address RIP: 0010:bitmap_get_stats+0x2b/0xa0 Call Trace: <TASK> md_seq_show+0x2d2/0x5b0 seq_read_iter+0x2b9/0x470 seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6c/0xf0 do_syscall_64+0x82/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Root cause is that bitmap_get_stats() can be called at anytime if mddev is still there, even if bitmap is destroyed, or not fully initialized. Deferenceing bitmap in this case can crash the kernel. Meanwhile, the above commit start to deferencing bitmap->storage, make the problem easier to trigger. Fix the problem by protecting bitmap_get_stats() with bitmap_info.mutex.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < eb2f9d98cd3e94a79fbf8fb90637c5b12e805428 ; affected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < 032fa54f486eac5507976e7e31f079a767bc13a8 ; affected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < 52848a095b55a302af92f52ca0de5b3112059bb8 ; affected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < 237e19519c8ff6949f0ef57c4a0243f5b2b0fa18 ; affected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < 4e9316eee3885bfb311b4759513f2ccf37891c09 ; affected 32a7627cf3a35396a8e834faf34e38ae9f3b1309 < 8d28d0ddb986f56920ac97ae704cc3340a699a30
Linux · Linuxaffected 2.6.13 ; unaffected 0 < 2.6.13 ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.130 ≤ 6.1.* ; unaffected 6.6.80 ≤ 6.6.* ; unaffected 6.12.13 ≤ 6.12.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD