{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53174", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:25.007Z", "datePublished": "2024-12-27T13:49:18.892Z", "dateUpdated": "2026-08-05T11:44:21.962Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:21.962Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: make sure cache entry active before cache_show\n\nThe function `c_show` was called with protection from RCU. This only\nensures that `cp` will not be freed. Therefore, the reference count for\n`cp` can drop to zero, which will trigger a refcount use-after-free\nwarning when `cache_get` is called. To resolve this issue, use\n`cache_get_rcu` to ensure that `cp` remains active.\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 7 PID: 822 at lib/refcount.c:25\nrefcount_warn_saturate+0xb1/0x120\nCPU: 7 UID: 0 PID: 822 Comm: cat Not tainted 6.12.0-rc3+ #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n1.16.1-2.fc37 04/01/2014\nRIP: 0010:refcount_warn_saturate+0xb1/0x120\n\nCall Trace:\n \n c_show+0x2fc/0x380 [sunrpc]\n seq_read_iter+0x589/0x770\n seq_read+0x1e5/0x270\n proc_reg_read+0xe1/0x140\n vfs_read+0x125/0x530\n ksys_read+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered by a read() syscall on the procfs file /proc/net/rpc/*/content (path proc_reg_read → seq_read → c_show); it requires local access, not network reachability.\nAC:L - The attacker controls both sides of the race — populating entries by writing the cache's channel file and dropping their refcount by writing flush, while looping reads of content — so the UAF window can be hit repeatably; per guidance, attacker-controlled races are Low.\nPR:L - In the init namespace content is root-only (mode 400), but an unprivileged user can create a user+network namespace (unshare -Ur; unshare -n) and become root of the fresh per-netns sunrpc caches, gaining read access to content and write access to channel/flush — empirically verified. This is Low, not High.\nUI:N - The attacker performs the cache population, flush, and read entirely on its own; no victim interaction is needed.\nS:U - The use-after-free is confined to the kernel's own memory/authority; no crossing of a security boundary such as VM or IOMMU is involved.\nC:H - The use-after-free lets c_show read fields of a potentially freed and reallocated cache_head and emit them into the content output the attacker reads, enabling disclosure of freed/reused kernel memory.\nI:H - A use-after-free on the cache_head (with cache_check/cache_put operating on freed, potentially reallocated memory) provides a corruption primitive; per guidance UAFs are scored High for integrity.\nA:H - The use-after-free corrupts refcounting and touches freed memory, readily causing an oops/panic; per guidance any UAF/crash is High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/cache.c" ], "versions": [ { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "e9be26735d055c42543a4d047a769cc6d0fb1504", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "02999e135b013d85c6df738746e8e24699befee4", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "c7dac3af57e38b2054f990e573256d90bf887958", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "068c0b50f3f700b94f78850834cd91ae3b34c2c1", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "acfaf37888e0f0732fb6a50ff093dce6d99994d0", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "ec305f303bf070b4f6896b7a76009f702956d402", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "d882e2b7fad3f5e5fac66184a347f408813f654a", "status": "affected", "versionType": "git" }, { "version": "d48cf356a13073853f19be6ca5ebbecfc2762ebe", "lessThan": "2862eee078a4d2d1f584e7f24fa50dddfa5f3471", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/cache.c" ], "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.64", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.11", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.2", "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": "4.20", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.64" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.11.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e9be26735d055c42543a4d047a769cc6d0fb1504" }, { "url": "https://git.kernel.org/stable/c/02999e135b013d85c6df738746e8e24699befee4" }, { "url": "https://git.kernel.org/stable/c/c7dac3af57e38b2054f990e573256d90bf887958" }, { "url": "https://git.kernel.org/stable/c/068c0b50f3f700b94f78850834cd91ae3b34c2c1" }, { "url": "https://git.kernel.org/stable/c/acfaf37888e0f0732fb6a50ff093dce6d99994d0" }, { "url": "https://git.kernel.org/stable/c/ec305f303bf070b4f6896b7a76009f702956d402" }, { "url": "https://git.kernel.org/stable/c/d882e2b7fad3f5e5fac66184a347f408813f654a" }, { "url": "https://git.kernel.org/stable/c/2862eee078a4d2d1f584e7f24fa50dddfa5f3471" } ], "title": "SUNRPC: make sure cache entry active before cache_show", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-53174", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:43:35.253566Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-11T15:45:26.877Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:47:09.594Z" } } ] } }