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CVE-2026-22991— libceph: make free_choose_arg_map() resilient to partial allocation

CVSS 7.5 · High EPSS 0.02% · P5
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I. Basic Information for CVE-2026-22991

Vulnerability Information
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Vulnerability Title
libceph: make free_choose_arg_map() resilient to partial allocation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于free_choose_arg_map对部分分配不具弹性，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 5cf9c4a9959b6273675310d14a834ef14fbca37c ~ 9b3730dabcf3764bfe3ff07caf55e641a0b45234 -
LinuxLinux 4.13 -

II. Public POCs for CVE-2026-22991

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III. Intelligence Information for CVE-2026-22991

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Same Patch Batch · Linux · 2026-01-23 · 34 CVEs total

CVE-2026-229849.8 CRITICALlibceph: prevent potential out-of-bounds reads in handle_auth_done()
CVE-2026-229807.8 HIGHnfsd: provide locking for v4_end_grace
CVE-2026-229887.8 HIGHarp: do not assume dev_hard_header() does not change skb->head
CVE-2026-229927.5 HIGHlibceph: return the handler error from mon_handle_auth_done()
CVE-2026-229907.5 HIGHlibceph: replace overzealous BUG_ON in osdmap_apply_incremental()
CVE-2026-22987net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
CVE-2026-22979net: fix memory leak in skb_segment_list for GRO packets
CVE-2026-22981idpf: detach and close netdevs while handling a reset
CVE-2026-22982net: mscc: ocelot: Fix crash when adding interface under a lag
CVE-2026-22983net: do not write to msg_get_inq in callee
CVE-2026-22985idpf: Fix RSS LUT NULL pointer crash on early ethtool operations
CVE-2026-22986gpiolib: fix race condition for gdev->srcu
CVE-2026-22978wifi: avoid kernel-infoleak from struct iw_point
CVE-2026-22989nfsd: check that server is running in unlock_filesystem
CVE-2026-22993idpf: Fix RSS LUT NULL ptr issue after soft reset
CVE-2026-22994bpf: Fix reference count leak in bpf_prog_test_run_xdp()
CVE-2026-22995ublk: fix use-after-free in ublk_partition_scan_work
CVE-2025-71145usb: phy: isp1301: fix non-OF device reference imbalance
CVE-2025-71161dm-verity: disable recursive forward error correction
CVE-2025-71160netfilter: nf_tables: avoid chain re-validation if possible

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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