| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: Fix UAF in blkcg_unpin_online()\n\nblkcg_unpin_online() walks up the blkcg hierarchy putting the online pin. To\nwalk up, it uses blkcg_parent(blkcg) but it was calling that after\nblkcg_destroy_blkgs(blkcg) which could free the blkcg, leading to the\nfollowing UAF:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in blkcg_unpin_online+0x15a/0x270\n Read of size 8 at addr ffff8881057678c0 by task kworker/9:1/117\n\n CPU: 9 UID: 0 PID: 117 Comm: kworker/9:1 Not tainted 6.13.0-rc1-work-00182-gb8f52214c61a-dirty #48\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022\n Workqueue: cgwb_release cgwb_release_workfn\n Call Trace:\n <TASK>\n dump_stack_lvl+0x27/0x80\n print_report+0x151/0x710\n kasan_report+0xc0/0x100\n blkcg_unpin_online+0x15a/0x270\n cgwb_release_workfn+0x194/0x480\n process_scheduled_works+0x71b/0xe20\n worker_thread+0x82a/0xbd0\n kthread+0x242/0x2c0\n ret_from_fork+0x33/0x70\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n ...\n Freed by task 1944:\n kasan_save_track+0x2b/0x70\n kasan_save_free_info+0x3c/0x50\n __kasan_slab_free+0x33/0x50\n kfree+0x10c/0x330\n css_free_rwork_fn+0xe6/0xb30\n process_scheduled_works+0x71b/0xe20\n worker_thread+0x82a/0xbd0\n kthread+0x242/0x2c0\n ret_from_fork+0x33/0x70\n ret_from_fork_asm+0x1a/0x30\n\nNote that the UAF is not easy to trigger as the free path is indirected\nbehind a couple RCU grace periods and a work item execution. I could only\ntrigger it with artifical msleep() injected in blkcg_unpin_online().\n\nFix it by reading the parent pointer before destroying the blkcg's blkg's." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "block/blk-cgroup.c" |
| ], |
| "versions": [ |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "83f5a87ee8caa76a917f59912a74d6811f773c67", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "8a07350fe070017a887433f4d6909433955be5f1", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "64afc6fe24c9896c0153e5a199bcea241ecb0d5c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "5baa28569c924d9a90d036c2aaab79f791fedaf8", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "29d1e06560f0f6179062ac638b4064deb637d1ad", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "4308a434e5e08c78676aa66bc626ef78cbef0883", |
| "lessThan": "86e6ca55b83c575ab0f2e105cf08f98e58d3d7af", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "block/blk-cgroup.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.7", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "5.7", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.234", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.177", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.121", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.67", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.6", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "5.10.234" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "5.15.177" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "6.1.121" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "6.6.67" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "6.12.6" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.7", |
| "versionEndExcluding": "6.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/83f5a87ee8caa76a917f59912a74d6811f773c67" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/8a07350fe070017a887433f4d6909433955be5f1" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/64afc6fe24c9896c0153e5a199bcea241ecb0d5c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/5baa28569c924d9a90d036c2aaab79f791fedaf8" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/29d1e06560f0f6179062ac638b4064deb637d1ad" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/86e6ca55b83c575ab0f2e105cf08f98e58d3d7af" |
| } |
| ], |
| "title": "blk-cgroup: Fix UAF in blkcg_unpin_online()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-56672", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
